## Summary A collaborator removed from a project keeps a **live, automatic feed** of that project's contents, because nothing on any revocation path deletes the webhook they created while they had access. Vikunja already has a revocation-cleanup routine that deletes other derived rows for exactly this reason. Its set is `{task_assignees, subscriptions}`. **`webhooks` and `link_shares` — the only two rows that carry a live channel into the project — are not in it**, and the routine is wired to one of four revocation paths. ## Details `pkg/models/teams.go:411` — `cleanupTaskMembersAfterTeamRemoval`, added in `9358954c9`, whose commit message states the invariant: *"cleanup team memberships, assignments and subscriptions when users lose access to a project"*. ```go canRead, _, permErr := project.CanRead(s, &user.User{ID: memberID}) ... if !canRead { projectsToCleanup = append(projectsToCleanup, projectID) } ... _, err = s.In("task_id", taskIDs).And("user_id = ?", memberID). Delete(&TaskAssginee{}) _, err = s.In("entity_id", taskIDs). Where("entity_type = ? AND user_id = ?", SubscriptionEntityTask, memberID). Delete(&Subscription{}) _, err = s.In("entity_id", projectsToCleanup). Where("entity_type = ? AND user_id = ?", SubscriptionEntityProject, memberID). Delete(&Subscription{}) ``` So you have already decided that losing read access must delete rows the departing user left behind, and that the test is a live `project.CanRead`. The gap is which rows are in the set. **And there is a second level, which is the sharper one.** That routine has exactly one caller: ``` pkg/models/listeners.go:1642 err = cleanupTaskMembersAfterTeamRemoval(s, event.Team.ID, event.Member.ID) ``` against four revocation paths: ``` pkg/models/project_team.go:151 TeamProject.Delete pkg/models/project_users.go:141 ProjectUser.Delete <- grep -c cleanup inside: 0 pkg/models/project_users.go:248 ProjectUser.Update <- the downgrade path pkg/models/team_members.go:91 TeamMember.Delete <- the only one wired up ``` Removing a user directly from a project — the ordinary operation — dispatches nothing at all. ## PoC Released `vikunja/vikunja:2.6.0` Docker image. The harness was proved first by reproducing a **known-fixed** advisory: `GHSA-qfwc` refuses the read-only member and returns the hash to the owner. Every run carries its own negative control. The strongest form is on the **team-removal path, where your cleanup routine does fire**: ``` == OWNER removes collab from the TEAM == -- did the cleanup routine run? -- assignees now: [] <- POSITIVE CONTROL: it ran collab direct read of task: HTTP 403 <- NEGATIVE CONTROL: access is gone -- webhook still delivering? -- WEBHOOK RECEIVED task_title='post-team-removal secret' task_desc='cleanup ran, webhook did not' -- link share still redeemable? -- [{"title":"post-team-removal secret","description":"cleanup ran, webhook did not"}] ``` The two controls are the argument: your own routine executed and removed the assignee rows, and the collaborator's direct read is refused with 403 — and the webhook created before removal still delivers the contents of a task created *after* it. On the `ProjectUser.Delete` path the same thing happens with no cleanup running at all. **One lab accommodation, stated plainly**: non-routable outbound IPs were enabled so a loopback sink was reachable. In a default deployment an attacker simply uses a public URL, so this changes nothing about reachability. ## Impact A former collaborator receives task titles and descriptions for the whole project, continuously, after their access has been revoked — including content created after revocation. **The honest counter-argument, which we would rather state than have you find.** Both artefacts stay **visible and auditable to the owner** afterwards: `GET /projects/{p}/webhooks` still shows `{"created_by":"collab"}` and `GET /projects/{p}/shares` still shows `{"shared_by":"collab"}`. An administrator reviewing project settings after an offboarding will find them. That is genuinely weaker than a silent channel, and it argues for the low end of Medium. The precondition is also real: the attacker held write access, so they could have taken a snapshot before leaving. **The only thing new here is access to content created after revocation** — which is precisely the line you drew yourselves in `GHSA-jp29-jrxc-92vf`, *"favourites readable after revocation"*. We think it holds. It is also the entirety of the claim, and we are not dressing it up as more. ## Affected range **All releases from `v0.22.0` through `v2.6.0`, and current `main`.** Determined by checking the code at each released tag: ``` v0.22.0 … v0.24.6 webhooks.go=yes cleanupRoutine=0 v1.0.0 … v2.6.0 webhooks.go=yes cleanupRoutine=1 ``` Project webhooks arrive in `ad7d485eb` (2023-10-17), first released in v0.22.0. The cleanup routine arrives in `9358954c9` (2025-10-09), first released in v1.0.0, and has never included webhooks or link shares. Still present on `main` at `d822e1c58`: the routine contains only `Delete(&TaskAssginee{})` and two `Delete(&Subscription{})`, and `ProjectUser.Delete` contains zero dispatches. Reproduced at v2.6.0; earlier versions asserted from source rather than run, and we are saying which is which. ## Recommended Fix Two changes, and they are independent — the first is the smaller one, the second is the one that closes the class. **Add the two row types to the cleanup set.** Alongside the existing `task_assignees` and `subscriptions` deletions, delete `webhooks` and `link_shares` whose `created_by` / `shared_by` is the departing user and whose project is in `projectsToCleanup`. The existing live `project.CanRead` test is already the right predicate. **Dispatch the cleanup from all four revocation paths**, not only team-member removal. `ProjectUser.Delete` and `ProjectUser.Update` (the downgrade case) are the common operations and currently fire nothing; `TeamProject.Delete` unshares a whole project from a team and is equally a revocation. A cheaper alternative for the second half, if reworking dispatch is unattractive: check `CanRead` for the webhook's `created_by` at delivery time, and for the share's `shared_by` at redemption time. That converts a cleanup problem into an authorization check on a path that already has the user id to hand. ## Severity `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N` — **6.5 Medium**. This is **the identical vector you assigned to your own webhook advisory**, `GHSA-7c2g-p23p-4jg3` (webhook BasicAuth credentials exposed to read-only members), copied rather than argued. `PR:L` because the attacker must have been provisioned with project write at some point; `C:H` because the channel carries full task titles and descriptions for the whole project continuously — the same `C:H` you assigned there for a credential leak of narrower scope. The auditability caveat above argues for the low end of Medium and we would not contest a lower score. ### The link share is strictly more capable, and we are not leading with it The same gap leaves a link share created by the departing collaborator redeemable after revocation, and a link share carries **read and write** — HTTP 201 demonstrated. On the same reasoning that would be `C:H/I:H` = 8.1 High. We are deliberately **not** proposing that, and leading with the webhook instead, because a link share has a real *"it is designed to be handed out"* defence and the webhook does not. That judgement is yours to make, and if you decide the share is the more serious half we will not argue.
PoC: node2shell-scanner
High fidelity detection mechanism for node2shell (CVE-2026-111497)
PoC: CVE-2026-111497-Toolkit
CVE-2026-111497 – Node.js Brotli Decoder OOB Write (CVSS 9.2) | Red/Blue Team suite for unpatched Node.js 22.x, 24.x, 26.x. 2 tools: Full Exploit (patch detection, remote DoS, Brotli bomb, lab RCE), Blue Team Checker (errno differential, version fingerprint, WAF detection, reporting) Only Use Ethically Only <3
PoC: runcloud-php2shell-patch
Build script for PHP (7.2 - 8.1) binaries mitigating PHP2Shell (CVE-2026-109618, CVE-2026-109619) on RunCloud Ubuntu servers.
PoC: php2shell-scan
A deliberately limited, read-only security scanner for assessing exposure to CVE-2026-109618 (RFC 1867 multipart OOM memory corruption) and CVE-2026-109619 (stale global state use-after-free) in PHP deployments.
PoC: php2shell
exploit php2shell (CVE-2026-109618 / CVE-2026-109619) for educational purposes
PoC: php2shell-doctor
The safe checker for the php2shell PHP RCEs (CVE-2026-109618/109619). Local, offline, vendor-backport aware.
PoC: node2shell-lab
Node2Shell (CVE-2026-111497, Node.js Brotli decoder OOB write) black-box pentest lab — crash-gated double flag, agent-calibrated. Part of the *2Shell lab series. EN/中文/日本語.
PoC: php2shell-ioc
Curated IoCs, detection engineering rules, and automated threat intel feeds for PHP2Shell (CVE-2026-109618 & CVE-2026-109619).
PoC: HTTP2Shell-PoC
PoC for CVE-2026-111497 (HTTP2Shell)
PoC: cve-2024-10441-synology-rce
Writeup y PoC educativo de CVE-2024-10441 (RCE pre-auth como root en Synology DSM via synoplugind). CVE ya parcheado; uso autorizado/defensivo.
PoC: php2shell-migration
Agent Skills skill to detect, patch and verify PHP apps affected by PHP2Shell (CVE-2026-109618, CVE-2026-109619) or outdated PHP. Works with Claude Code, Codex, Copilot, Cursor, Gemini CLI, OpenCode.
PoC: php2shell
CVE-2026-109618 exploit tool — RCE via OOM ghost bucket in PHP POST parsing (CVSS 9.2)
PoC: CVE-2026-114509
Python detector for Laravel TokenGuard CVE-2026-114509 with local dependency analysis, remote authentication checks, and JSON reporting.
PoC: CVE-2026-110264
Non-invasive Python detector for CVE-2026-110264 in GitLab, featuring version checks, offline log analysis, and JSON reporting.
PoC: php-pins
Find every PHP version your repositories pin, and what PHP2Shell (CVE-2026-109618, CVE-2026-109619) means for each. One POSIX sh script; reads files only.
PoC: php2shell
PHP Runtime Vulnerability Assessment Toolkit — CVE-2026-109618 & CVE-2026-109619
PoC: cve-2026-98260-vivo-gki-research
Research notes: porting CVE-2026-98260 to vivo/iQOO GKI 6.6.127 (no exploit code; coordinated disclosure planned)
PoC: brotli-cve-check
Agent skill + script to scan projects for CVE-2026-111497 (Brotli), rate criticality and suggest fixes
PoC: php2shellX
Next-generation exploit orchestrator for CVE-2026-109618/619 — adds Cloudflare WAF bypass, flexible target specification (URL/host/port/path/batch), multi-format output (JSON/CSV/table), resume capability, and lab automation (Docker restart). Authored by TESTERXMA.
PoC: a12-ghostlock
One-click root for the Samsung Galaxy A12 (SM-A125F) via CVE-2026-43499 (GhostLock) - KernelSU-compatible userspace stack, grant dialog, verified root in Neo Backup / App Manager / Shizuku
PoC: o3root
Shizuku-driven CVE-2026-98260 root + KernelSU runtime LKM loader for Xiaomi yingtian / lhasa (kernel 6.18.21)
PoC: php-fpm-docker-PHP-7.4-CVE-2026-109618-109619-free
php:7.4-fpm-CVE-2026-109618-109619-free
PoC: cve-2026-25262-poc
CVE-2026-25262 (Qualcomm BootROM) deep-dive on the Black Hat Asia 2026 'A journey through Sahara' talk + read-only Sahara/EDL recon harness. GPLv3.
PoC: CVE-2026-74580
CVE-2026-74580 vhost: reset the vring metadata cache on vring reconfiguration - Exploit
PoC: log4shell-audit-4
Quarterly security briefing research notes and remediation tracking for Log4Shell (CVE-2021-44228).
PoC: CEV-2020-25213_wp-file-manger_exploit
CVE-2020-25213 - Unauthenticated RCE exploit for WP File Manager plugin (≤ 6.0) | Educational purposes only
PoC: php-vulns-discovered-23-10-2026
Patch temporanee per sistemi con versioni di PHP inferiori a 8.2.35 contro CVE-2026-109618 - CVE-2026-109619 - CVE-2026-115560
PoC: CVE-2026-109618-php56-public
Exact-build PHP 5.6 research and reproducible labs for CVE-2026-109618 and CVE-2026-109619
PoC: Compiled-CVE-2023-21752
Compiled version of Wh04m1001's exploit for iwr/wget delivery to VM.
PoC: CVE-2026-83548
CVE-2026-83548 — SonicWall SMA1000 Work Place pre-auth SSRF
PoC: CVE-2026-64849
CVE-2026-64849 — MLflow SSRF
PoC: CVE-2026-21627
CVE-2026-21627 proof of concept and exploit script
PoC: php8.1-cve-109618-109619-fix
php:8.1.34-fpm-alpine + official PHP patch for CVE-2026-109618/109619
PoC: php7.4-cve-109618-109619-fix
php:7.4.33-fpm-alpine + official PHP patch for CVE-2026-109618/109619
PoC: php2shell
Exploit & analysis for PHP2Shell (CVE-2026-109618 / CVE-2026-109619). Demonstrating memory disclosure, ASLR bypass, and RCE via session.upload_progress memory bailout dangling pointers.
PoC: php2shell-demo
🛡️ Hands-on defensive Docker lab for the October 2026 RCE week — PHP2Shell (CVE-2026-109618/619), Node.js Brotli & Next.js sharp. See the attack surface and blast radius, and learn to shut them down. No exploits.
PoC: CVE-2026-115560
CVE-2026-115560: PHP session upload-progress serialize_handler mismatch → pre-auth object injection → RCE. Check/exploit/verify scripts + Docker lab + Suricata/Sigma detection rules.
PoC: CVE-2026-86426
CVE-2026-86426 CHECK
PoC: php-radar
Detection-only exposure scanner for PHP2Shell (CVE-2026-109618/109619): finds PHP across repositories, hosts, a network perimeter, and AWS, and grades each install by version and config without triggering the bug.
PoC: spip-cve-2026
PoC for CVE-2026-72708 (blind SQLi) and CVE-2026-109378 (SSRF) in SPIP, both fixed in 4.4.18
PoC: php2shell
PHP2Shell: finding and patching affected PHP CVE-2026-109618 and CVE-2026-109619
PoC: php2shell-audit
Exposure scanner, patch verifier and threat hunter for CVE-2026-109618/9, with a cyberpunk TUI.
PoC: DFRoot
Fork of datfooldive/DFRoot (DirtyFrag CVE-2026-43284, ReSukiSU) + GitHub Actions APK build
PoC: php8-cve-109618-109619-fix
php:8.0.30-fpm-alpine + official PHP patch for CVE-2026-109618/109619
PoC: brotli-secfix
Security backport toolkit for CVE-2026-111497 on Ubuntu 24.04, featuring upstream patch verification, custom Debian package builds, and offline remediation procedures.
PoC: CVE-2026-88009-PoC
CVE-2026-88009 — Traefik forwards a rootless opaque request target that routing/forwardAuth see as '/'. Auth bypass + access-log evasion, verified v3.7.10 / v3.7.13.
PoC: CVE-2026-85595-PoC
CVE-2026-85595 — Traefik digestAuth authentication bypass (unknown username => empty HA1). Lab-verified: v3.7.10 bypass, v3.7.11 401.
PoC: CVE-2026-85168-PoC
CVE-2026-85168 — n8n Git node RCE from repo-local filter.*.clean / merge-driver config on add|commit|checkout. Verified v2.35.3 / v2.36.2.
PoC: CVE-2026-86076-PoC
CVE-2026-86076 — n8n expression sandbox escape via class-field __sanitize rebinding (backend RCE). Verified v2.37.6 (uid=node) / v2.37.7.
PoC: CVE-2026-109618-CVE-2026-109619-php2shell-
MOSTAFA JR7 - Custom security research framework targeting PHP 8.4.26 Apache Prefork RCE and ASLR bypass.
PoC: CVE-2026-111497-node2shell
CVE-2026-111497 Node2Shell — Node.js Brotli OOB Write RCE PoC (CVSS 9.2)
PoC: CVE-2026-56190-Windows-Server-2022-RDP
Unauthenticated RDP vulnerability in termsrv.dll (Windows Server 2022). Proof of Concept for heap spray, XFG bypass, Instruction Pointer control, and reliable Denial of Service (Event ID 7031).
PoC: cve-2026-111497-rce-checker
Lab-only exact-profile RCE/DoS validator for CVE-2026-111497; refuses non-loopback targets
PoC: php2shell-probe
Standalone detection probe for PHP2Shell (CVE-2026-109618 / CVE-2026-109619): passive version fingerprint by default, opt-in active crash probe via Nuclei.
PoC: portainer-cve-2026-44848-checker
Non-destructive checker for CVE-2026-44848: Portainer missing authorization on Docker plugin endpoints
PoC: php2shell
Check and patch all installed PHP versions against PHP2Shell (CVE-2026-109618, CVE-2026-109619) on Debian/Ubuntu with PHP from Surý (HestiaCP supported)
PoC: CVE-2026-38526-Exploit
my version of an exploit for Krayin CRM v2.2.x - CVE-2026-38526
PoC: cve-2026-114820-java-scan
Read-only Ansible playbook that finds Java truststores still anchoring the eMudhra and AAA roots removed for CVE-2026-114820.
PoC: php-5.4-cve-2026-php2shell-patch
Patch for old php 5.4.23 version from CVE-2026-109618 и CVE-2026-109619 vulnerabilities
PoC: CVE-2026-116012
NSA Ghidra contains a numeric truncation vulnerability in PackedDecode::skipAttribute and skipAttributeRemaining in marshal.cc.
PoC: CVE-2026-116011
A remote denial of service vulnerability in CrowCPP due to uncontrolled recursion.
PoC: project2026_20261024_php2shellcheck
One-file PHP check for the PHP2Shell fixes (CVE-2026-109618, CVE-2026-109619). No exploit, no network.
PoC: CVE-2026-109618-POC
A PHP app that ships an unpatched PHP runtime (PHP2Shell), for the Devzy scan to flag. No exploit code.
PoC: rootkit
越狱助手 · RootKit for Honor Magic9 (CVE-2026-64560 → cred 写 → 自制内核模块 → KernelSU)，Flutter + Shizuku 一键 root
PoC: php2shell-scan-revamp
A clean, modular, and extensively documented reimplementation of the Assetnote php2shell scanner for detecting CVE-2026-109618 and CVE-2026-109619 in PHP environments.
PoC: php2shell-detection-engineering-lab
Production-grade detection engineering suite (Sigma rules & Wazuh XML) and DFIR triage scripts for CVE-2026-109618 / CVE-2026-109619 (PHP2Shell).
PoC: CVE-2026-98260-BRM-AN00
CVE-2026-98260 temporary root for HONOR Win2 BRM-AN00, handed to BakaSU. No flashing.
PoC: patchferry-check
Free read-only scripts to check servers for PHP2Shell (CVE-2026-109618 / CVE-2026-109619) and PHP end-of-life versions
PoC: php2shell-php
Detect php2shell (CVE-2026-109618 / CVE-2026-109619) on remote PHP targets — behavioral multipart probes, version fallback, async CLI in PHP.
PoC: php2shell-el7-el8-rpm-fixed
Unofficial patched PHP RPMs for EL7/EL8 mitigating php2shell (CVE-2026-109618, CVE-2026-109619), including legacy Remi SCL and AppStream builds.
PoC: cve-2026-110152-chrome-ngle-rce-poc
PoC: CVE-2026-110152 Chrome ANGLE vertex-attribute translation heap buffer overflow (CVSS 9.6)
PoC: cve-2026-109618-php2shell-poc
CVE-2026-109618 (php2shell part 1): local deterministic memory-safety PoC
PoC: php2shel
This repository contains operational information regarding the critical PHP vulnerabilities tracked by CERT-EU as CVE-2026-109618 and CVE-2026-109619. PHP is a widely used open-source server-side scripting language, so these vulnerabilities may affect a broad range of internet-facing web applications and products that embed or depend on PHP.
PoC: docker-php74-trixie
Docker Image php:7.4-fpm with security fixes for CVE-2026-109618 and CVE-2026-109619 updated to build and run on Debian Trixie
PoC: CVE-2024-45490-libexpat-poc
PoC + Docker test harness for CVE-2024-45490 (libexpat XML_ParseBuffer negative length integer handling issue)
PoC: log4shell-audit-3
Log4Shell (CVE-2021-44228) remediation tracking for the quarterly security briefing
PoC: RHYTHM-SINGH
High fidelity scanner for php2shell (CVE-2026-109618 and CVE-2026-109619)
PoC: php2shell-detection
Detection and response package for php2shell (CVE-2026-109618 / CVE-2026-109619): Suricata, Zeek, YARA, Sigma, ModSecurity rules, hunting queries, SOC triage, patch matrix. No exploit code.
PoC: el7-php71-security
Patched PHP 7.1 RPMs for CentOS 7 (Remi php-* and php71-php-*) fixing CVE-2026-109618 / CVE-2026-109619, with an installer that detects the server's PHP, upgrades it and can roll back.
PoC: php2shell-check
Check if your server is vulnerable for latest PHP2Shell (CVE-2026-109618,CVE-2026-109619, CVE-2026-115560)
PoC: php2shell-2026
Published indicators and a log-hunting guide for the PHP2Shell PHP flaws (CVE-2026-109618, CVE-2026-109619)
PoC: php2shell-repro
PHP2Shell CVE-2026-109618/109619: lab-verified reproduction, root-cause analysis & visualizations (educational)
PoC: php2shell-claude-code-prompt
Prompt para corrigir o PHP2Shell (CVE-2026-109618 e CVE-2026-109619) com o Claude Code, aprovando cada passo. Português e inglês.
PoC: poc-cve-2026-111497
CVE-2026-111497 (Node2Shell): deteccion del decoder Brotli vulnerable en Python y Node por el codigo de error real del decoder, con laboratorio HTTP local
PoC: cve-2026-114509-laravel-tokenguard
CVE-2026-114509 — Laravel TokenGuard authentication bypass (CVSS 9.2): PoC, root-cause analysis, Docker lab, and reproduction guide
PoC: node2shell-cve-2026-111497
Node2Shell / HTTP2Shell (CVE-2026-111497) exposure-audit kit — read-only scanner + agent prompt pack. Portable: macOS bash 3.2 + Linux. 78-test suite, CI on 3 platforms.
PoC: node2shell-radar
Find Node.js websites and see which ones need attention. Desktop Node2Shell Scanner for CVE-2026-111497.
PoC: chrome2shell
Chrome Vulnerability Laboratory . CVE-2026-110922
PoC: node2shell
Independent reproduction of the Brotli decoder out-of-bounds write behind CVE-2026-111497 (Node2Shell): payload built from first principles, A/B against the patched release, and a measured ceiling that rules out the advertised RCE path.
PoC: php2shell-runcloud-builds
Unofficial patched PHP 5.6-8.1 builds for RunCloud on Ubuntu 16.04-24.04 (PHP2Shell, CVE-2026-109618/109619), with scripts to build them yourself
PoC: honor-aap-an00-root-skill
Reproducible temporary root for Honor 500 AAP-AN00 (CVE-2026-43499, source, prebuilt payload, guides and evidence)
PoC: PHP-CVE-Scanner
Harmless fingerprint scanner for PHP CVE-2026-109618 / CVE-2026-109619 (CLI + Web UI)
PoC: CVE-2026-59774
Gitea LFI to RCE exploit (CVE-2026-59774) — arbitrary file read via Org-mode #+INCLUDE, chained to remote code execution through git hook injection
PoC: CVE-2026-115560
PoC and Docker lab for CVE-2026-115560 — PHP session upload-progress serialize_handler mismatch to unauthenticated object injection / RCE. Validated end-to-end on php:8.4.27-apache with mitigation and no-switch controls.
PoC: CVE-2026-110264
PoC, reproducible labs, live evidence, Nuclei fingerprint, and technical report for CVE-2026-110264 — GitLab Org-mode/Onigmo unauthenticated RCE (CVSS 10.0); render oracle validated on GitLab CE 19.3.1.
PoC: CVE-2026-111497
PoC, Docker lab, and technical report for CVE-2026-111497 (Node2Shell) — Node.js Brotli decoder invalid block-switch OOB write; validated errno differential and weaponized remote DoS, RCE analysis included.
PoC: GHSA-w8hw-w9fx-j79w
PHP2Shell PoC for GHSA-w8hw-w9fx-j79w / CVE-2026-109618 — PHP OOM longjmp memory corruption. Validated OOM producers and dangling session-state worker crash on PHP 8.4.26 mod_php, with instrumented lab and full report.
PoC: php2shell-kit
Single-command wrapper for the php2shell toolkit (CVE-2026-109618 / CVE-2026-109619) - auto version detection, profile dispatch, Docker lab
PoC: CVE-2026-39987-POC-Marimo
CVE-2026-39987 POC Marimo
PoC: php2shell-poc
CVE-2026-109618 & CVE-2026-109619 — PHP Pre-Auth RCE Exploit & Detection Toolkit
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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