{"items":[{"id":"NVI-00015075","kind":"vulnerability","title":"Traefik: BasicAuth singleflight key collision allows authenticated identity spoofing","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-6765-c87h-8mrf","CVE-2026-71326"],"plain_summary":"GitHub lists this reviewed advisory for github.com/traefik/traefik/v3, 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-18d36c3bf95ddbafd268981bcc54c1b2"],"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-18d36c3bf95ddbafd268981bcc54c1b2","url":"https://github.com/advisories/GHSA-6765-c87h-8mrf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-6765-c87h-8mrf","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T02:28:46.523Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-18d36c3bf95ddbafd268981bcc54c1b2"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a low severity vulnerability in Traefik's BasicAuth middleware. Concurrent password verifications are deduplicated through a singleflight group whose key was the delimiter-free concatenation of the submitted password and the stored secret, so a request carrying an unconfigured username — whose secret is empty — can produce the same key as a configured user's valid request and receive that request's successful result. Exploitation requires the attacker to already hold a valid credential **and** to read the stored password hash, which is only reachable through paths that are themselves privileged: the API is documented as admin-only, the Kubernetes path requires read access to the Secret, and the Docker path requires access to the socket. The key now encodes the password length as a prefix, so distinct (password, secret) pairs can no longer collide. Only the v3.6 line from v3.6.11 onwards and the v3.7 line are affected; earlier v3 releases and the v2 line do not carry the vulnerable deduplication path.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v3.6.25\n- https://github.com/traefik/traefik/releases/tag/v3.7.10\n\n## For more information\n\nIf you h","public_affected_ranges":[">= 3.6.11, <= 3.6.24"]},{"certainty":"source_listed","source_ids":["sr-18d36c3bf95ddbafd268981bcc54c1b2"],"technology":"github.com/traefik/traefik/v3","known_exclusions":[],"conditions_summary":"## Summary\n\nThere is a low severity vulnerability in Traefik's BasicAuth middleware. Concurrent password verifications are deduplicated through a singleflight group whose key was the delimiter-free concatenation of the submitted password and the stored secret, so a request carrying an unconfigured username — whose secret is empty — can produce the same key as a configured user's valid request and receive that request's successful result. Exploitation requires the attacker to already hold a valid credential **and** to read the stored password hash, which is only reachable through paths that are themselves privileged: the API is documented as admin-only, the Kubernetes path requires read access to the Secret, and the Docker path requires access to the socket. The key now encodes the password length as a prefix, so distinct (password, secret) pairs can no longer collide. Only the v3.6 line from v3.6.11 onwards and the v3.7 line are affected; earlier v3 releases and the v2 line do not carry the vulnerable deduplication path.\n\n## Patches\n\n- https://github.com/traefik/traefik/releases/tag/v3.6.25\n- https://github.com/traefik/traefik/releases/tag/v3.7.10\n\n## For more information\n\nIf you h","public_affected_ranges":[">= 3.7.0, <= 3.7.9"]}],"null_published_at":"2026-11-03T10:03:26.544Z","source_updated_at":"2026-08-06T16:34:39.000Z","source_disclosed_at":"2026-08-06T16:34:38.000Z","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":"42594"}