{"id":"CVE-2026-88010","revision":"009f3f46c2b74fcb931516d7971048e8","records":[{"revision":"009f3f46c2b74fcb931516d7971048e8","observedAt":"2026-10-25T16:19:22.228+00:00","statement":{"source":"nvd","id":"CVE-2026-88010","aliases":[],"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":"2026-09-22T16:18:06.963+00:00","modifiedAt":"2026-09-24T21:22:19.873+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/traefik/traefik/commit/ddc1bf4660b85fd61fafdd821eb8216fb1a0b130","https://github.com/traefik/traefik/pull/13816","https://github.com/traefik/traefik/releases/tag/v3.7.13","https://github.com/traefik/traefik/security/advisories/GHSA-8fcf-v89g-xpg6"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88010","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Undergoing Analysis","weaknesses":["CWE-208"],"productCriteria":[],"sourceDates":{"published":"2026-09-22T16:18:06.963","lastModified":"2026-09-24T21:22:19.873"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-88010","identifiers":["CVE-2026-88010"]},"retained":false,"historicalAffected":[]}],"coverage":[]}