GHSA-qqjf-53cj-pwvv: Traefik HTTP/3 Backend NTLM Connection Reuse
HIGHCritical vulnerability
What to do
- Critical severity — schedule an urgent patch.
## Summary Traefik's HTTP/3 request path did not initialize the connection-scoped backend transport holder that isolates connection-bound NTLM and Negotiate (Kerberos) authentication on the HTTP/1.1 and HTTP/2 paths. The HTTP/3 entrypoint reuses the HTTPS handler chain and reaches the same backend round-tripper, but its `ConnContext` never called `service.AddTransportOnContext`, so `kerberosRoundTripper` fell back to the shared backend transport instead of a per-frontend-connection pool. …
CVE · detail
- CVE-2026-88007nvd ↗EPSS 0.37%
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