Gitea OAuth2 PKCE S256 verifier bypass in code.gitea.io/gitea
Gitea OAuth2 PKCE S256 verifier bypass in code.gitea.io/gitea
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-26247US | — | — | ||
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. | ||||
02
references
External citations — patches, advisories, analysis.
- https://blog.gitea.com/release-of-1.25.5WEB
- https://github.com/advisories/GHSA-m5ch-ppfx-xv3vADVISORY
- https://github.com/go-gitea/gitea/commit/750649c1ef092c95f95b206b9d5fa17471a0b1f5WEB
- https://github.com/go-gitea/gitea/commit/bf8d11bb212ba2a76596d8a90e74e7d664571324WEB
- https://github.com/go-gitea/gitea/pull/36462WEB
- https://github.com/go-gitea/gitea/pull/36477WEB
- https://github.com/go-gitea/gitea/releases/tag/v1.25.5WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-26247ADVISORY
scry
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan