GHSA-5423-jcjm-2gpv — v2
CRITICALGHSA-5423-jcjm-2gpv is a critical-severity (CVSS 9.1) vulnerability in github.com/traefik/traefik/v2. A fix is available for github.com/traefik/traefik/v2 — see the affected versions and patch details below.
Traefik affected by Go HTTP Request Smuggling Vulnerability
Real-World Exposure
github.com/traefik/traefik/v2🐹github.com/traefik/traefik/v3🐹github.com/traefik/traefik/v3Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Summary
net/http: request smuggling through invalid chunked data: The net/http package accepts data in the chunked transfer encoding containing an invalid chunk-size line terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a bare LF in a chunk extension as part of the extension, this could permit request smuggling. [CVE-2025-22871] Vendor Affected Components: Go: 1.23.x < 1.23.8
More Details: CVE-2025-22871
Patches
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/traefik/traefik/v2 | all versions | 2.11.24go get github.com/traefik/traefik/v2@v2.11.24 |
| 🐹Go | github.com/traefik/traefik/v3 | all versions | 3.3.6go get github.com/traefik/traefik/v3@v3.3.6 |
| 🐹Go | github.com/traefik/traefik/v3 | ≥ 3.4.0-rc1&&< 3.4.0-rc2 | 3.4.0-rc2go get github.com/traefik/traefik/v3@v3.4.0-rc2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/traefik/traefik/v2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/traefik/traefik/v2 to 2.11.24 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5423-jcjm-2gpv is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-5423-jcjm-2gpv can be triaged on real exposure rather than presence alone.
Tailored to GHSA-5423-jcjm-2gpv. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-5423-jcjm-2gpv in your dependencies?
O3 Security finds GHSA-5423-jcjm-2gpv across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.