### Summary Multiple denial-of-service vulnerabilities have been discovered in HTTP/2 server implementations. All have been rated with a severity impact of [Important](https://access.redhat.com/security/updates/classification). The vulnerabilities target HPACK, the header compression scheme in HTTP/2, where a small request can trigger large memory allocations on the server. ### Details Credit to the original researcher, I'm mostly just run their tool against the code base. [Security Bulletins](https://access.redhat.com/security/vulnerabilities/RHSB-2026-007): https://access.redhat.com/security/vulnerabilities/RHSB-2026-007 Exploit details: https://blog.calif.io/p/codex-discovered-a-hidden-http2-bomb This bug was fixed in upstream pingora v0.8.1, but our fork (v0.8.2) is missing this important [PR](https://github.com/praxis-proxy/pingora/commit/d193c8d49b8b7c1c1ede93183759caa4f6906bbd) to set the default h2 options. (edited) ### PoC * Generate certificates ``` openssl req -x509 -newkey ec -pkeyopt ec_paramgen_curve:prime256v1 -keyout server.key -out server.crt -days 3650 -nodes -subj "/CN=localhost" ``` * Create praxis config as follow ``` listeners: - name: web address: "0.0.0.0:8443" tls: certificates: - cert_path: /etc/praxis/server.crt key_path: /etc/praxis/server.key filter_chains: [main] filter_chains: - name: main filters: - filter: router routes: - path_prefix: "/" host: "example.api.com" cluster: backend - filter: load_balancer clusters: - name: backend endpoints: - "httpbingo.org:443" tls: verify: false ``` * Start the container ``` docker run --name praxis --user $(id -u):$(id -g) -it --rm -p 8443:8443 -v ./config.yaml:/etc/praxis/config.yaml -v ./server.crt:/etc/praxis/server.crt -v ./server.key:/etc/praxis/server.key ghcr.io/praxis-proxy/praxis:0.5.1 ``` * Check container memory ``` $ docker stats CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS 362cfa472792 praxis 0.00% 6.473MiB / 62.49GiB 0.01% 7.57kB / 126B 0B / 0B 22 ``` * In another terminal run the attack ``` ./hpack_bomb.py --host 127.0.0.1 --port 8443 -n 10 ``` * Observer the container memory ``` 98b040c5e5ad praxis 0.13% 687.1MiB / 62.49GiB 1.07% 41.6MB / 362kB 0B / 0B 23 ``` Memory usage spiked to around 700MB, and even after the attack ended, the memory was not freed up. * Patch the code to set h2options ``` diff --git a/protocol/src/http/pingora/handler/mod.rs b/protocol/src/http/pingora/handler/mod.rs index dc684ad..fc59234 100644 --- a/protocol/src/http/pingora/handler/mod.rs +++ b/protocol/src/http/pingora/handler/mod.rs @@ -18,6 +18,7 @@ use std::{collections::HashMap, sync::Arc, time::Duration}; use arc_swap::ArcSwap; use bytes::Bytes; +use pingora_core::protocols::http::v2::server::H2Options; use pingora_core::{Result, apps::HttpServerOptions, server::Server, services::listening::Service}; use pingora_proxy::{Session, http_proxy}; use praxis_core::{config::ABSOLUTE_MAX_BODY_BYTES, connectivity::Upstream}; @@ -151,6 +152,11 @@ where let service_name = format!("http-proxy:{name}", name = listener.name); let mut proxy = http_proxy(&server.configuration, handler); proxy.server_options = Some(h2c_server_options()); + let mut h2_options = H2Options::new(); + h2_options.max_header_list_size(65536); + h2_options.max_concurrent_streams(32); + proxy.h2_options = Some(h2_options); + let mut service = Service::new(service_name, proxy); if let Some(tx) = super::listener::add_listener(&mut service, listener)? { cert_watcher_shutdowns.push(tx); ``` * Rerun the attack, the memory usage looks a lot better now ``` CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS b1c82abca409 praxis 0.04% 10.09MiB / 62.49GiB 0.02% 1.16MB / 23.4kB 950kB / 0B 23 ```
PoC: CVE-2026-112445
CVE-2026-112445: The Simplest macOS Local Privilege Escalation to Date
PoC: CVE-2026-43664
AirPods Bluetooth MAC Address Disclosure via NSUserDefaults
PoC: OtherActivityToken
Exploit for CVE-2025-0098, Activity token leak due to pid-only check and then use of that token for arbitrary startActivity()
PoC: CVE-2026-112706-CoreMedia-fd-leak
Independent discovery & coordinated disclosure: CoreMedia bytestream XPC (mediaplaybackd) vended live file descriptors for protected paths to any sandboxed app on iOS 26.5–27.0.1. Fixed in iOS 27.2 as CVE-2026-112706. PoC + evidence.
PoC: CVE-2026-98260-GhostKey
GhostKey - CVE-2026-98260 一键提权工具（Shizuku + NDK Native）
PoC: CVE-2026-98260-vivo-x-fold6-poc
CVE 2026 98260 vivo x fold6 poc
PoC: CVE-2026-98260-PMX110-Root618-Jailbreak
CVE-2026-98260 (exec: posix timer UAF) LKM jailbreak for OPPO Find X10 Pro Max (PMX110) and OnePlus 16 (PYB110): one-command root via shell uid 2000, with KernelSU / FinaSU / SukiSU / KernelSU-Next handover. Release build Root618 1.5.12 (R8-obfuscated).
PoC: CVE-2026-98260-GhostKey
GhostKey - CVE-2026-98260 一键提权工具（Shizuku + NDK Native）
PoC: brotli-node2shell-check
Vulnerability checker and remediation guide for CVE-2026-111497 vulnerability in Google's Brotli decoder
PoC: php2shell-lab
Lab reproduction, exposure probe and detection content for CVE-2026-109618 / CVE-2026-109619 (PHP2Shell). Defensive research; no exploit.
PoC: php2shell
🐘 Ansible CVE-2026-109618, CVE-2026-109619 scanner
PoC: CVE-2026-26026-GLPI
Minimal source comparison and local lab files for CVE-2026-26026 in GLPI 11.0.5 and 11.0.6
PoC: CVE-2026-98432
Linux kernel IPv4 SYN IP-options use-after-free CVE-2026-98432 Mitigation work (Ansible Role)
PoC: cve-2026-98432-mitigation
Temporary mitigation for CVE-2026-98432 (Linux IPv4 TCP ireq_opt use-after-free): drop IPv4 TCP with IP options, disable MPTCP. Tested scripts + verification. EN/KO.
PoC: kpatch-cve-2026-98432
kpatch livepatch for CVE-2026-98432 (and CVE-2026-99999) on AlmaLinux and Rocky Linux 8, 9 and 10
PoC: phishing-analysis-thm
SOC-style investigation of a Netflix phishing email, CVE-2017-11882 exploitation, IOC extraction, and detection engineering mapping.
PoC: CVE-2026-33439
Pre-auth RCE exploit for OpenIdentityPlatform OpenAM <=16.0.5 via Java deserialization of the jato.clientSession parameter (CVE-2026-33439, CVSS 9.8). Comparator-based gadget chain with in-band command output through Tomcat ApplicationFilterChain thread-locals.
PoC: FBI-Tor-Exploit-CVE-2013-1690
Academic cybersecurity research project analyzing and restoring the FBI's 2013 Tor Browser deanonymization exploit, focusing on CVE-2013-1690, Firefox use-after-free vulnerabilities, exploit mechanisms, and historical forensic analysis.
PoC: Bootjack
CVE-2026-97631 C
PoC: CVE-2026-48907
Adapted PoC for CVE-2026-48907 - Joomla! JCE extension < 2.9.99.5
PoC: cve-2026-98432-audit
cve-2026-98432 audit script (ipv4 TCP inet_opt/ireq_opt use-after-free)
PoC: php2shell-poc
CLI scanner and PoC for CVE-2026-109618 / CVE-2026-109619 (PHP OOM heap corruption and session upload-progress injection, CVSS 9.2). Affects PHP 5.4.0-8.5.11; patched in 8.2.35, 8.3.36, 8.4.27, 8.5.12. No external dependencies.
PoC: CVE-2026-88804
PoC CVE-2026-88804 (Rancher)
PoC: php2shell-poc
CVE-2026-109618/109619 — 5 RCE chains + detection rules (Suricata, Sigma, ModSecurity). PHP session.upload_progress pre-auth exploit research.
PoC: CVE-2026-98260-dada-android
Verified CVE-2026-98260 Android port for Xiaomi 15 dada OS4.0.0.22.XOCCNXM
PoC: CVE-2025-4960
Local Privilege Escalation via Improper Authorization Handling in EPSON Printer Controller Installer
PoC: ghostlock-kirkwood
CVE-2026-43499 (GhostLock) port for the Google TV Streamer (kirkwood / MT8696): single-file, per-boot temporary root + interactive root shell, with a build-matching case study and adaptation guide.
PoC: node2shell
Node2Shell (CVE-2026-111497) detection-only scanner + lab — RedSide Security
PoC: CVE-2026-97555
CVE-2026-97555: heap overflow in the Linux SMB client DACL rewrite (cifs.ko) — analysis, POC, and an arm64 exploit chain ending in a uid-0 credential overwrite on the reference build
PoC: cve-2026-110311-gitea-lab
Local Gitea CVE-2026-110311 reproduction: vulnerable vs patched comparison, Python verifier, recorded evidence, and Turkish report.
PoC: nginx-rift-cve-2026-42945-lab
Interactive NGINX CVE-2026-42945 educational simulation built with HTML, CSS, and JavaScript. Features vulnerable and patched modes, synthetic request inspection, memory visualization, event logging, and security recommendations. No real exploit execution.
PoC: CVE-2026-12118-POC-
POC for CVE-2026-12118
PoC: CVE-2026-104286
Exploit for CVE-2026-104286 — FortiMail: Unauthenticated Arbitrary File Write → Code Execution
PoC: node2shell
Scanner to checking (CVE-2026-111497) vulnerability
PoC: PHP2Shell
CVE-2026-109618 & CVE-2026-109619 — Pre-Auth RCE in PHP Core (session.upload_progress). Scanner, exploit verifier, and full technical analysis.
PoC: CVE-2026-50053
Offline Python detector for CVE-2026-50053 version exposure in Zimbra Collaboration Suite.
PoC: CVE-2026-115889
Offline Python detector for CVE-2026-115889 version exposure in Wasmtime.
PoC: CVE-2026-53921
Offline Python source-pattern auditor for CVE-2026-53921 in odhcpd.
PoC: gitlab-rce-toolkit
CVE-2026-97229 + CVE-2026-110264 — GitLab Onigmo RCE Exploit Toolkit (CVSS 10.0)
PoC: CVE-2026-101259
Reproducer for CVE-2026-101259 — Apache Camel camel-coap consumer sent the exception message to the CoAP client as a 5.00 payload (CWE-209). Camel Spring Boot + Camel Quarkus.
PoC: CVE-2026-71569
Reproducer for CVE-2026-71569 — Apache Camel camel-a2a push-notification webhook guard accepted an IPv6 unique local address (fc00::/7) reached through a host name (CWE-918). Camel Spring Boot + Camel Quarkus.
PoC: RDPBleed
CVE-2026-56190 - Windows RDP Server Uninitialized Resource leads to RCE
PoC: CVE-2026-94386
Reproducer for CVE-2026-94386 — Apache Camel camel-oauth cross-scope token reuse via a JVM-global token cache keyed only on endpoint+clientId (CWE-524). Camel Spring Boot + Camel Quarkus.
PoC: CVE-2026-95629
Reproducer for CVE-2026-95629 — Apache Camel camel-docling passed the CamelDoclingOutputFilePath header to docling's --output verbatim (CWE-22). Camel Spring Boot + Camel Quarkus.
PoC: php2shell-advisory-response
PHP2Shell (CVE-2026-109618 / CVE-2026-109619) advisory response: inventory, patch, Wazuh hunt mapping, attestation outline.
PoC: CVE-2026-95628
Reproducer for CVE-2026-95628 — Apache Camel camel-docling custom-argument path validation did not reject absolute paths, an incomplete fix of CVE-2026-40047 (CWE-22). Camel Spring Boot + Camel Quarkus.
PoC: CVE-2026-95663
Reproducer for CVE-2026-95663 — Apache Camel camel-keycloak served a cached token introspection result past the token's expiry (CWE-613). Camel Spring Boot + Camel Quarkus.
PoC: CVE-2026-97798_LPE_Windows
CVE-2026-97798 PoC — WER Time Travel Debugging argument injection to SYSTEM (Windows 11 LPE), with an adaptive faultrep.dll resolver.
PoC: CVE-2026-95664
Reproducer for CVE-2026-95664 — Apache Camel camel-aws2-s3 evaluated a header-supplied object key as a Simple expression (CWE-917). Camel Spring Boot + Camel Quarkus.
PoC: woff2shell
poc of CVE-2026-111497 delivered as a WOFF2 file
PoC: wiz-bulb-tool
WiZ smart bulb LAN security tool - auto-discovery, CVE-tagged audit, intel recon & device control. Extends CVE-2019-18980 to new hardware. No credentials required.
PoC: CVE-2026-90885
Reproducer for CVE-2026-90885 — Apache Camel camel-saxon XQuery XML External Entity via an already-built javax.xml.transform.Source (CWE-611, HIGH). Camel Spring Boot + Camel Quarkus.
PoC: cve-2026-109618-cve-2026-109619-poc
pHp2Shell CVE 2016 109618 - 109619
PoC: php2shell
Realistic multi-version lab + toolkit for the PHP php2shell pre-auth RCE (CVE-2026-109618/109619): detect, blindly prove, and understand it. No shared mounts, no planted files, no LFI.
PoC: secure-api-cve-2024-23897
Work 1 — secure Flask REST API, three-stage CI, and CVE-2024-23897 (Jenkins CLI) analysis
PoC: charla-php2shell
PHP2Shell (CVE-2026-109618/109619): demos reproducibles y guia de parcheo paso a paso.
PoC: PHP2shell
CVE-2026-109618_CVE-2026-109619
PoC: waffers
The layer that protects you. Proactive defense-in-depth Web Application Firewall mitigating recent critical PHP engine vulnerabilities including PHP2Shell (CVE-2026-109618/9), PHP-CGI Argument Injection (CVE-2024-4577), iconv Filter Chains (CVE-2024-2961), and stream wrapper abuse.
PoC: node2shell-inventory-scanner
Local inventory triage for Node2Shell (CVE-2026-111497): grade every Node, Bun and Brotli copy on disk. Detection-only, no network probes, no payloads.
PoC: php2shell-check
A Claude Skill that passively checks whether a website (and optionally its subdomains) runs PHP, confirms the version where possible, and flags exposure to PHP2Shell (CVE-2026-109618 / CVE-2026-109619)
PoC: CVE-2026-98260-GhostKey
GhostKey - CVE-2026-98260 一键提权工具（Shizuku + NDK Native）
PoC: CVE-2026-97631-PoC
An educational laboratory for studying a PXE network-boot vulnerability in EDK II / OVMF. It builds a pinned EDK II revision, boots a UEFI virtual machine in QEMU, and includes Python proof-of-concept scripts for investigating denial of service (DoS) and memory corruption.
PoC: practica-integradora-ciberseguridad
Práctica Integradora de Ciberseguridad (Comisión 1) - Investigación, análisis técnico y laboratorio práctico de CVE-2021-41773 (Apache HTTP Server)
PoC: node2shell-audit
Read-only audit for Node2Shell (CVE-2026-111497): Node.js/Bun Brotli decoder out-of-bounds write
PoC: cve-2026-111497-wordpress-poc
CVE-2026-111497 RCE PoC for one pinned Docker Official Image for WordPress
PoC: demo-zip-rce-sandbox
Live demo: the same vulnerable Rust zip crate (RUSTSEC-2026-0367 setuid + CVE-2026-115905 zip cloaking) contained by a deny-by-default Cosmonic WebAssembly sandbox.
PoC: php2leak
Remote Zend MM ASLR leak testbed (PHP CVE-2026-109618 / CVE-2026-109619)
PoC: CVE-2026-101767-research
Research notes on CVE-2026-101767 — unauthenticated vulnerability in Oracle Application Object Library (E-Business Suite)
PoC: threat-intelligence-log4shell-analysis
Cybersecurity research project analyzing threat intelligence feeds, Log4Shell (CVE-2021-44228), attack progression, remediation, incident response, and threat hunting.
PoC: CVE-2026-15723
Offline Python detector for CVE-2026-15723 version exposure in self-managed GitLab CE/EE, with CSV/JSON inventories and auditable reports.
PoC: CVE-2026-105014
Offline Python applicability detector for CVE-2026-105014 in Azure Pipelines, with strict CSV/JSON inventories and auditable reports.
PoC: CVE-2026-114625
Offline Python detector for CVE-2026-114625 exposure in on-premises VeloCloud Orchestrator, with train-specific build checks and auditable reports.
PoC: CVE-2026-97785
Offline Python applicability detector for CVE-2026-97785 in Microsoft Entra application proxy, with CSV/JSON inventories and auditable reports.
PoC: CVE-2026-83938
Offline Python applicability detector for CVE-2026-83938 in Azure Kubernetes Configuration Service, with CSV/JSON inventories and auditable reports.
PoC: CVE-2026-110063
Offline Python applicability detector for CVE-2026-110063 in Azure VM Inspector, with strict CSV/JSON inventories and auditable reports.
PoC: php56-amzn1-security
Security-patched php56 RPMs for Amazon Linux 1 (AMI 2018.03): PHP2Shell (CVE-2026-109618, CVE-2026-109619) and post-5.6.40 fixes backported from deb.sury.org
PoC: CVE-2026-109618-exploit
[PHP2Shell] Golang exploit for CVE-2026-109618 / CVE-2026-109619: Unauthenticated RCE in PHP 5.4–8.5.11 via OOM corruption + session.upload_progress UAF
PoC: CVE-2026-93903
Security advisory for CVE-2026-93903 affecting LiteSpeed Web Server.
PoC: s25u-ghostlock-kernelsu-lkm
Galaxy S25 Ultra (SM-S9380): GhostLock/CVE-2026-43499 memory-only root + KernelSU LKM via kallsyms prelink; Zygisk findings
PoC: cve-2026-98260-uaf
CVE-2026-98260 (posix-cpu-timers exec UAF) exploit research: S9280 Android 14 GKI 6.1 — UAF trigger + zero-write primitive + SELinux Permissive. Handoff doc in HANDOFF.md
PoC: copy-fail-CVE-2026-31431-aarch64
Linux 4.19 aarch64 PoC for CVE-2026-31431 (Copy Fail) - AF_ALG/authencesn page-cache write
PoC: aia-pdfjs-poc
CVE-2024-4367 PDF.js FontMatrix PoC - authorized pentest artifact
PoC: CVE-2025-10035
CVE-2025-10035 is a critical vulnerability in Fortra GoAnywhere MFT that may allow attackers to execute commands remotely on a vulnerable server.
PoC: CVE-2026-35223-Joomla-Access-Control
Proof of Concept for CVE-2026-35223 – Joomla Improper Access Control
PoC: php2shell-audit
Non-intrusive detector for PHP2Shell (CVE-2026-109618 / CVE-2026-109619) - scans codebases and live hosts for vulnerable PHP versions and risky config. Detection, not exploitation.
PoC: TimerRoot
Android front end for CVE-2026-98260: root shell + KernelSU late-load through Shizuku
PoC: php2shell-fixed-images
Reproducible RHITE fixed PHP runtime images for CVE-2026-109618 and CVE-2026-109619
PoC: php-worker-pin
Multi-worker exploitation of the PHP 8.5 OOM-to-RCE chain (CVE-2026-109618/109619): pool pinning, measured
PoC: PHP2SHELL-Lab
Laboratorio para detectar y explotar las vulnerabilidades CVE-2026-109618 y CVE-2026-109619
PoC: CVE-2026-79397-Authenticated-OS-Command-Injection-in-ONT-4GE-RFDW-Ping-Diagnostics
Authenticated OS command injection in ONT-4GE-RFDW’s Ping diagnostics exploitable via default credentials.
PoC: rw-salon
CVE-2024-4442
PoC: rw-tutor
CVE-2024-4223
PoC: CVE-2026-111497-DOS-
CVE-2026-111497 DOS
PoC: rw-stock
CVE-2024-36779
PoC: php2shell-nse-scanner
Advanced Nmap Scripting Engine (NSE) script designed to identify PHP2Shell vulnerabilities (CVE-2026-109618 / CVE-2026-109619). Features multi-layer Black-Box analysis resilient against WAF, proxies, and header stripping.
PoC: rw-web-directory-free
CVE-2024-3552
PoC: cve-2025-27740
Proof-of-concept exploit for CVE-2025-27740 Subject Key Identifier injection in Active Directory Certificate Services
PoC: rw-country-state-city-auto-dropdown
cve-2024-3495
PoC: rw-fluentform
CVE-2024-2771
PoC: CVE-2023-42824
PoC / exploit archive for CVE-2023-42824
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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