{"id":"CVE-2026-101027","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-101027","generatedAt":"2026-10-28T01:45:29.200Z","title":"When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions.","description":"When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass.","published":"2026-10-06T20:17:08.000Z","lastModified":"2026-10-15T02:32:40.000Z","status":"Analyzed","sourceIdentifier":"88ee5874-cf24-4952-aea0-31affedb7ff2","cvss":{"version":"3.1","score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"cwe":["CWE-346"],"affected":["gitea/gitea"],"epss":{"score":0.00233,"percentile":0.14038,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00164,"percentile":0.05109}]},"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 (0.23%). 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":"2026-10-07T13:30:10.000Z","detail":{"from":null,"score":"7.7","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.7 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-06T20:17:08.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-06T20:17:08.233Z"},"summary":"New CVE, high severity (CVSS 7.7)."}],"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/39426","tags":["Patch"],"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-fqjr-23c8-gg9m","tags":["Mitigation","Vendor Advisory"],"source":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-101027","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."}