All vulnerabilities
CVE-2026-103059GHSA-8pwg-hcgm-54cp

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

Gitea Gitea
Open in ThreatlineRecord JSON
CVSS
9.1Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published6 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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.

Text from CVE List

Affected versions 1

  • Giteaaffected: all versions through 1.27.3CVE List

References 4