| id: GO-2026-6342 |
| modules: |
| - module: code.gitea.io/gitea |
| versions: |
| - fixed: 1.25.5 |
| vulnerable_at: 1.25.4 |
| summary: Gitea OAuth2 PKCE S256 verifier bypass in code.gitea.io/gitea |
| cves: |
| - CVE-2026-26247 |
| ghsas: |
| - GHSA-m5ch-ppfx-xv3v |
| references: |
| - advisory: https://github.com/advisories/GHSA-m5ch-ppfx-xv3v |
| - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-26247 |
| - web: https://blog.gitea.com/release-of-1.25.5 |
| - web: https://github.com/go-gitea/gitea/commit/750649c1ef092c95f95b206b9d5fa17471a0b1f5 |
| - web: https://github.com/go-gitea/gitea/commit/bf8d11bb212ba2a76596d8a90e74e7d664571324 |
| - web: https://github.com/go-gitea/gitea/pull/36462 |
| - web: https://github.com/go-gitea/gitea/pull/36477 |
| - web: https://github.com/go-gitea/gitea/releases/tag/v1.25.5 |
| source: |
| id: GHSA-m5ch-ppfx-xv3v |
| created: 2026-09-01T14:11:14.309433-04:00 |
| review_status: UNREVIEWED |
