CVE-2026-103059 — Gitea built-in SSH server authentication bypass through key case folding
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 ca…
Published: 2026-10-06 · CVSS: 9.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7