v2.11.56

Gerstep/cybosv2.11.56Aug 26, 2026by github-actions[bot]

AI Summary

Fixes multiple CVEs and applies various bug fixes to the v2.11 branch including HTTP/3 and Kubernetes provider improvements.

Key Highlights

Fixed multiple security vulnerabilities (CVEs GHSA-7ghq-v6jf-g56c, GHSA-rf44-j88r-hh8c).
Applied read timeout, idle timeout, and max header bytes for HTTP/3.
Added an entry point option to handle request headers with aliasing names.
Rejected negative weights in TCP and UDP weighted services.

Full Release Notes

**Important:** Please read the [migration guide](https://doc.traefik.io/traefik/v2.11/migration/v2/#v21156).

**CVE fixed:**
- Advisory [GHSA-7ghq-v6jf-g56c](https://github.com/traefik/traefik/security/advisories/GHSA-7ghq-v6jf-g56c)
- Advisory [GHSA-rf44-j88r-hh8c](https://github.com/traefik/traefik/security/advisories/GHSA-rf44-j88r-hh8c)

**Bug fixes:**
- **[http3]** Apply read timeout, idle timeout, and max header bytes for HTTP/3 ([#13717](https://github.com/traefik/traefik/pull/13717) @gndz07)
- **[server]** Add an entry point option to handle request headers with aliasing names ([#13720](https://github.com/traefik/traefik/pull/13720) @rtribotte)
- **[tcp, udp]** Reject negative weights in TCP and UDP weighted services ([#13749](https://github.com/traefik/traefik/pull/13749) @rtribotte)
- Bump etcd client modules to v3.5.33 ([#13756](https://github.com/traefik/traefik/pull/13756) @mmatur)