{"items":[{"id":"NVI-00016345","kind":"vulnerability","title":"Traefik HTTP/3 Backend NTLM Connection Reuse","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-qqjf-53cj-pwvv","CVE-2026-88007"],"plain_summary":"GitHub lists this reviewed advisory for github.com/traefik/traefik/v3, github.com/traefik/traefik/v2. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-69a99009fe0b604a98335e5fec0a404c"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-69a99009fe0b604a98335e5fec0a404c","url":"https://github.com/advisories/GHSA-qqjf-53cj-pwvv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-qqjf-53cj-pwvv","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T22:54:05.264Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-69a99009fe0b604a98335e5fec0a404c"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nTraefik'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. On a route served over HTTP/3 to a backend that binds identity to a persistent connection via NTLM or Negotiate, an unrelated HTTP/3 client could be assigned a backend connection already authenticated as a victim and inherit that identity, reading victim-only data and performing actions as the victim without presenting the victim's credentials. Affected deployments require HTTP/3 enabled on the entrypoint, a backend using connection-bound NTLM/Negotiate authentication, and backend keep-alive; deployments using ordinary per-request authentication are not affected.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.57\n- https://github.com/traefik/traefik/releases/tag/v3.7.13\n\n## Fo","public_affected_ranges":[">= 3.0.0, < 3.7.13"]},{"certainty":"source_listed","source_ids":["sr-69a99009fe0b604a98335e5fec0a404c"],"technology":"github.com/traefik/traefik/v2","known_exclusions":[],"conditions_summary":"## Summary\n\nTraefik'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. On a route served over HTTP/3 to a backend that binds identity to a persistent connection via NTLM or Negotiate, an unrelated HTTP/3 client could be assigned a backend connection already authenticated as a victim and inherit that identity, reading victim-only data and performing actions as the victim without presenting the victim's credentials. Affected deployments require HTTP/3 enabled on the entrypoint, a backend using connection-bound NTLM/Negotiate authentication, and backend keep-alive; deployments using ordinary per-request authentication are not affected.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v2.11.57\n- https://github.com/traefik/traefik/releases/tag/v3.7.13\n\n## Fo","public_affected_ranges":[">= 2.11.0, < 2.11.57"]}],"null_published_at":"2026-11-04T10:04:27.934Z","source_updated_at":"2026-09-10T23:04:07.000Z","source_disclosed_at":"2026-09-10T23:04:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-01T22:54:05.264Z"}],"next_cursor":null,"snapshot_revision":"42594"}