{"action":"Upgrade code.gitea.io/gitea to 1.25.5 or later.","affected":[{"fixed":"1.25.5","introduced":"0"}],"component":"code.gitea.io/gitea","cve_ids":["CVE-2026-26247"],"ecosystem":"Go","epss":0.00495,"exploited":false,"fixed_versions":["1.25.5"],"ghsa_id":"GHSA-m5ch-ppfx-xv3v","id":"tcs_01M5KGTATKQBAV45WR639Z9BAZ","modified_at":"2026-09-02T19:30:09.214141942Z","published_at":"2026-09-02T18:37:32Z","references":["https://osv.dev/vulnerability/GO-2026-6342","https://github.com/advisories/GHSA-m5ch-ppfx-xv3v","https://nvd.nist.gov/vuln/detail/CVE-2026-26247","https://blog.gitea.com/release-of-1.25.5","https://github.com/go-gitea/gitea/commit/750649c1ef092c95f95b206b9d5fa17471a0b1f5","https://github.com/go-gitea/gitea/commit/bf8d11bb212ba2a76596d8a90e74e7d664571324","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"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GO-2026-6342","url":"https://osv.dev/vulnerability/GO-2026-6342"},{"source":"nvd","source_id":"CVE-2026-26247","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26247"}],"summary":"Gitea OAuth2 PKCE S256 verifier bypass in code.gitea.io/gitea"}