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GHSA-gv8r-9rw9-9697

CRITICAL

Traefik affected by TLS ClientAuth Bypass on HTTP/3

Also known asGO-2026-4530
Published
Feb 20, 2026
Updated
Mar 13, 2026
Affected
3 pkgs
Patched
2 / 3
Exploits
None indexed

Blast Radius

3 pkgs affected
🐹github.com/traefik/traefik🐹github.com/traefik/traefik/v2🐹github.com/traefik/traefik/v3

Real-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

There is a potential vulnerability in Traefik managing HTTP/3 connections.

More details in the CVE-2025-68121.

Patches

Workarounds

No workaround

For more information

If you have any questions or comments about this advisory, please open an issue.

Affected Packages

3 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/traefik/traefikall versionsNo fix
🐹Gogithub.com/traefik/traefik/v2all versions2.11.37
🐹Gogithub.com/traefik/traefik/v3all versions3.6.8

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/traefik/traefik. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    No patched version of github.com/traefik/traefik has shipped for GHSA-gv8r-9rw9-9697 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-gv8r-9rw9-9697 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-gv8r-9rw9-9697. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary There is a potential vulnerability in Traefik managing HTTP/3 connections. More details in the [CVE-2025-68121](https://nvd.nist.gov/vuln/detail/CVE-2025-68121). ## Patches - https://github.com/traefik/traefik/releases/tag/v2.11.37 - https://github.com/traefik/traefik/releases/tag/v3.6.8 ## Workarounds No workaround ## For more information If you have any questions or comments about this advisory, please [open an issue](https://github.com/traefik/traefik/issues).
O3 Security · Impact-Aware SCA

Is GHSA-gv8r-9rw9-9697 in your dependencies?

O3 detects GHSA-gv8r-9rw9-9697 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.