{"items":[{"id":"NVI-00015321","kind":"vulnerability","title":"Traefik: Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6p8f-p8j2-rqmv","CVE-2026-54765"],"plain_summary":"GitHub lists this reviewed advisory for github.com/traefik/traefik/v3. 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-5b0691ebe8ac2d3b2ecb640e572b54ec"],"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-5b0691ebe8ac2d3b2ecb640e572b54ec","url":"https://github.com/advisories/GHSA-6p8f-p8j2-rqmv","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6p8f-p8j2-rqmv","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-5b0691ebe8ac2d3b2ecb640e572b54ec"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a medium severity vulnerability in Traefik's Kubernetes Gateway API provider.\nWhen two accepted HTTPRoutes target the same backend Service:port but configure different\n`backendRef` filters, Traefik may resolve both routes to the same child service and apply\nonly one route's filter set to all requests reaching that backend. In Gateway deployments\nwhere `backendRef` filters set security-sensitive headers — such as tenant identity,\nauthorization context, or values the backend trusts — an attacker who can create an\naccepted HTTPRoute sharing the same backend Service:port may cause their route's filter\ncontext to be applied to another route's requests, potentially crossing namespace\nboundaries when a `ReferenceGrant` permits cross-namespace targeting.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v3.7.6\n\n## For more information\n\nIf you have any questions or comments about this advisory, please open an issue.\n\n\nOriginal Description\n\n# Traefik Gateway HTTPRoute backendRef filter context collision across routes sharing Service:port\n\n## Summary\n\nTraefik's Kubernetes Gateway API pro","public_affected_ranges":[">= 3.7.0, <= 3.7.5"]}],"null_published_at":"2026-11-03T10:03:26.569Z","source_updated_at":"2026-08-06T16:40:32.000Z","source_disclosed_at":"2026-08-06T16:40:31.000Z","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":"2026-11-03T02:28:46.523Z"}],"next_cursor":null,"snapshot_revision":"39771"}