{"id":"CVE-2026-26247","revision":"cec7295301c84cb2933d0f55569781c9","records":[{"revision":"cec7295301c84cb2933d0f55569781c9","observedAt":"2026-10-27T07:23:21.229+00:00","statement":{"source":"nvd","id":"CVE-2026-26247","aliases":[],"title":"Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.","description":"Gitea versions before 1.25.5 do not persist the OAuth2 PKCE S256 challenge method correctly during authorization, allowing token exchange without the expected verifier check.","state":0,"publishedAt":"2026-07-03T21:16:58.417+00:00","modifiedAt":"2026-10-25T15:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://blog.gitea.com/release-of-1.25.5/","https://github.com/go-gitea/gitea/pull/36462","https://github.com/go-gitea/gitea/pull/36477","https://github.com/go-gitea/gitea/releases/tag/v1.25.5"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-26247","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-284"],"productCriteria":[],"sourceDates":{"published":"2026-07-03T21:16:58.417","lastModified":"2026-10-25T15:10:00.147"},"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-2026-26247","identifiers":["CVE-2026-26247"]},"retained":false,"historicalAffected":[]}],"coverage":[]}