### Summary In Vikunja v2.6.0 the task position recalculation that runs when a saved filter view is created fails open when the requesting user has no accessible projects. Instead of aborting, the search that feeds the recalculation loses its project scope entirely and returns every task in the instance. The server then writes one `task_positions` row per task per view (four views per filter) into views owned by the requesting user, including rows that reference tasks of other tenants the user can never see. Any authenticated user can trigger this. The impact is a cross-tenant integrity violation, a single-request write amplification primitive that scales with instance size, and a violation of the invariant stated in the fix for GHSA-w39f-h553-h2mx that position writes are scoped by project read access. ### Details Vikunja computes kanban and list ordering in a shared `task_positions` table keyed by `(task_id, project_view_id)`. When a saved filter is created, `SavedFilter.Create` (`pkg/models/saved_filters.go:130`) calls `CreateDefaultViewsForProject` (`pkg/models/project_view.go:816`) which, for every default view it creates, calls `RecalculateTaskPositions` with `addExistingTasksToView = true` (`pkg/models/project_view.go:447`). `RecalculateTaskPositions` (`pkg/models/task_position.go:312`) builds a `TaskCollection` and, for filter views (`view.ProjectID < -1`), resets the project scope to zero and injects the saved filter's filter string. The scope of the subsequent search is derived from `getRelevantProjectsFromCollection` (`pkg/models/task_collection.go:188`), which for `ProjectID == 0` returns exactly the projects the requesting user can access. Inside `dbTaskSearcher.Search` (`pkg/models/task_search.go`), the WHERE clause is assembled at line 632: ```go cond := builder.And(builder.Or(projectIDCond, favoritesCond), where, filterCond) ``` `projectIDCond` is only set when `len(opts.projectIDs) > 0` and `favoritesCond` only when the caller opted into the favorites arm, which `RecalculateTaskPositions` never does. With zero accessible projects, an empty filter string (which produces no filter condition in `getTaskFiltersFromFilterString`) and no search string, all four children of the `builder.And` are invalid. go-xorm's condition builders silently drop invalid children, so the query becomes `SELECT ... FROM tasks` with no WHERE clause at all. The result is written back unconditionally: the function deletes the view's position rows and bulk-inserts one row per returned task per view. Because the filter creation path runs this for four default views, one request writes `4 x total_task_count` rows, every one of them referencing tasks the requesting user has no relationship with, including tasks in other users' private projects. Reaching the zero-project precondition does not require any bug beyond this one. `UpdateUserGeneralSettings` (`pkg/models/user_settings.go:105`) assigns `default_project_id` from the request body without validating that the referenced project exists or belongs to the caller. A user can therefore point their default project at any project id, which unblocks deleting their own Inbox (deletion is refused only while the Inbox is the default project, error 3012 in `pkg/models/error.go:482`). After the Inbox is gone, `getRawProjectsForUser` returns an empty list. Two neighboring controls confirm the intended invariant exists elsewhere and is enforced in sibling paths. The event-driven filter update path gates candidate filters on the filter owner's access to each task's project (`matchTasksToViewsOfFilter`, introduced by commit `b1ad4063e7`), and the fix for GHSA-w39f-h553-h2mx validates position target views. The recalculation path on filter creation has no equivalent gate and contradicts the advisory statement that recalculation "aborts on its own project read-access check". ### PoC > [vikunja-filter-empty-scope-cross-tenant-positions-PoC.zip](https://github.com/user-attachments/files/32740623/vikunja-filter-empty-scope-cross-tenant-positions-PoC.zip) The attached archive contains `deployment/deploy.sh` (local Vikunja v2.6.0 on loopback with SQLite) and `poc/poc.sh`, which performs the full sequence: 1. Victim registers, creates a private project and a task. 2. Attacker registers, sets `default_project_id` to the victim's project via `PUT /api/v2/user/settings/general`, deletes their own Inbox, and now has zero accessible projects. 3. Control: `GET /api/v2/projects/{victim}` returns 403. 4. Attacker creates a saved filter with `{"filter":"","filter_include_nulls":true}`. 5. Verification: direct SQLite inspection shows `task_positions` rows referencing the victim's task in all four of the attacker's filter views. 6. Control: `GET /api/v2/projects/{filter_pseudo_project}/tasks` returns 0 items, so the written rows are not readable back through collection endpoints. Result: 10 checks passed on two consecutive runs, each from a wiped database. ### Impact An authenticated user, even one with no project access at all, causes the server to persist cross-tenant references: rows pointing at arbitrary other users' tasks are written into views the attacker controls. Task content is not exposed through the documented read paths (verified), so this is an integrity and availability issue rather than a direct disclosure: - Cross-tenant integrity violation. The `task_positions` state of the attacker's views now encodes other tenants' objects, against the access model the rest of the code enforces. - Write amplification and denial of service. One cheap request performs a full-table scan plus `4 x N` inserts, where N is the number of tasks in the instance. On an instance with 100,000 tasks that is 400,000 rows per request, and the request can be repeated without bound. CPU, IO and storage costs scale with instance size while attacker cost stays constant.
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:N/I:L/A:L
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