CVE-2026-103059

UNKNOWN 0.0

Gitea built-in SSH server authentication bypass through key case folding

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

When Gitea's built-in SSH server is enabled (`START_SSH_SERVER = true`), the presented public key was looked up with an SQL `LIKE` comparison of its encoded content, which is case-insensitive on some databases, including the default SQLite. An attacker who can construct a case variant of another user's registered RSA public key for which they can derive the private key could have that key matched to the victim's account and authenticate over SSH as that user. Keys are now looked up by fingerprint.

Vendor	gitea
Product	gitea
Published	Oct 6, 2026

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Affected Versions

Gitea / Gitea

0 ≤ 1.27.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/go-gitea/gitea/security/advisories/GHSA-8pwg-hcgm-54cp github.com: https://github.com/go-gitea/gitea/pull/39423 blog.gitea.com: https://blog.gitea.com/release-of-28.0.0/ github.com: https://github.com/go-gitea/gitea/releases/tag/v28.0.0

Credits

🔍 https://github.com/carlini https://github.com/TheFox0x7 https://github.com/wxiaoguang