{"id":"EUVD-2026-84532","revision":"0f04262d668d426a95cee9c15b852dac","records":[{"revision":"0f04262d668d426a95cee9c15b852dac","observedAt":"2026-10-28T10:35:13.93+00:00","statement":{"source":"euvd","id":"EUVD-2026-84532","aliases":["CVE-2026-88010","GHSA-8fcf-v89g-xpg6"],"title":"Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurren…","description":"Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurrent requests for absent usernames therefore coalesce on one key while configured usernames perform separate password hashes, creating an unauthenticated timing discrepancy that reveals whether a username exists. Sequential checks remain cost-equalized, Traefik v2 and Digest authentication are not affected, and the issue does not disclose credentials or bypass authentication. This issue is fixed in version 3.7.13.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.3,"severity":null}],"references":["https://github.com/traefik/traefik/security/advisories/GHSA-8fcf-v89g-xpg6","https://github.com/traefik/traefik/pull/13816","https://github.com/traefik/traefik/commit/ddc1bf4660b85fd61fafdd821eb8216fb1a0b130","https://github.com/traefik/traefik/releases/tag/v3.7.13"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84532","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 22, 2026, 3:38:25 PM","dateUpdated":"Sep 22, 2026, 4:00:11 PM"},"relatedAdvisories":[{"id":"openSUSE-SU-2026:12076-1","title":"traefik-3.7.13-1.1 on GA media","vulnerabilityIds":["CVE-2026-88004","CVE-2026-88007","CVE-2026-88008","CVE-2026-88009","CVE-2026-88010"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-84532","identifiers":["EUVD-2026-84532","CVE-2026-88010","GHSA-8fcf-v89g-xpg6"]},"retained":false,"historicalAffected":[]}],"coverage":[]}