{"id":"CVE-2026-26247","revision":"98e466e4effa4ebea4819884fda27faa","records":[{"revision":"98e466e4effa4ebea4819884fda27faa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-26247","aliases":[],"title":"Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange","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":"2026-07-03T20:19:34.82+00:00","modifiedAt":"2026-07-07T16:59:17.604+00:00","affected":[{"ecosystem":"Vendor product","name":"Gitea Open Source Git Server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Gitea\",\n                    \"product\": \"Gitea Open Source Git Server\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.25.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[],"references":["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","https://blog.gitea.com/release-of-1.25.5/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-26247","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-26247","identifiers":["CVE-2026-26247"]},"retained":false,"historicalAffected":[]}],"coverage":[]}