Gitea OAuth2 PKCE S256 challenges are not enforced during token exchange

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-26247 · Microsoft / collected KEV context

EUVD-2026-41629

GHSA-m5ch-ppfx-xv3v

GO-2026-6342

cve-program · CVE-2026-26247

• 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/

euvd · EUVD-2026-41629

• 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/

nvd · CVE-2026-26247

• 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

osv · GHSA-m5ch-ppfx-xv3v

• https://nvd.nist.gov/vuln/detail/CVE-2026-26247
• https://github.com/go-gitea/gitea/pull/36462
• https://github.com/go-gitea/gitea/pull/36477
• https://github.com/go-gitea/gitea/commit/750649c1ef092c95f95b206b9d5fa17471a0b1f5
• https://github.com/go-gitea/gitea/commit/bf8d11bb212ba2a76596d8a90e74e7d664571324
• https://blog.gitea.com/release-of-1.25.5
• https://github.com/go-gitea/gitea
• https://github.com/go-gitea/gitea/releases/tag/v1.25.5

osv · 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

No related operational record is retained in the current change model.