{"id":"CVE-2026-103059","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103059","generatedAt":"2026-10-28T01:12:27.901Z","title":"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.","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.","published":"2026-10-06T20:17:14.000Z","lastModified":"2026-10-15T02:26:27.000Z","status":"Analyzed","sourceIdentifier":"88ee5874-cf24-4952-aea0-31affedb7ff2","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"cwe":["CWE-305"],"affected":["gitea/gitea"],"epss":{"score":0.00391,"percentile":0.32975,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00156,"percentile":0.04183}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-07T15:45:07.000Z","detail":{"from":null,"score":"9.1","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.1 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-06T20:17:14.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-06T20:17:14.377Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://blog.gitea.com/release-of-28.0.0/","tags":["Release Notes"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39423","tags":["Patch","Issue Tracking"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","tags":["Release Notes"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-8pwg-hcgm-54cp","tags":["Vendor Advisory"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103059","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}