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v3.6.21

EricLBuehler/diffusion-rsv3.6.21Jun 10, 2026by github-actions[bot]

AI Summary

Fixes CVE-2026-54761 and implements various bug fixes related to gatewayapi, server, and TLS components.

Key Highlights

  • Fixes CVE-2026-54761
  • Rejects cross-provider references with backendRefs.namespace
  • Bumps github.com/pires/go-proxyproto to v0.12.0
  • Fixes routers with same host, different tlsoptions
  • Fixes snicheck for routers with no hosts

New Features

  • Security vulnerability patch
  • GatewayAPI reference validation
  • Proxy protocol update
  • TLS router and snicheck fixes

Full Release Notes

**CVE fixed:**
- [CVE-2026-54761](https://nvd.nist.gov/vuln/detail/CVE-2026-54761) (Advisory [GHSA-3g6v-2r68-prfc](https://github.com/traefik/traefik/security/advisories/GHSA-3g6v-2r68-prfc))

**Bug fixes:**
- **[k8s/gatewayapi]** Reject cross-provider references with backendRefs.namespace ([#13322](https://github.com/traefik/traefik/pull/13322) @youkoulayley)
- **[server]** Bump to github.com/pires/go-proxyproto v0.12.0 ([#13313](https://github.com/traefik/traefik/pull/13313) @timschumi)
- **[tls]** Fix routers with same host, different tlsoptions on different entryPoint ([#13329](https://github.com/traefik/traefik/pull/13329) @juliens)
- **[tls]** Fix snicheck for routers with no hosts ([#13333](https://github.com/traefik/traefik/pull/13333) @rtribotte)