{"id":"CVE-2026-25946","title":"When OpenID sign-in is enabled, Gitea accepts a user-supplied OpenID URL and performs discovery requests without validating the destination against internal network addresses","summary":"When OpenID sign-in is enabled, Gitea accepts a user-supplied OpenID URL and performs discovery requests without validating the destination against internal network addresses. An unauthenticated remote attacker can cause the server to co…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-918"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:45.377","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-25946","references":[{"url":"https://github.com/go-gitea/gitea/pull/36729","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-9574-292w-9wmw","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"tags":["nvd"],"ingestedAt":"2026-10-14T15:36:14.019Z","slug":"CVE-2026-25946","body":"## Overview\n\nWhen OpenID sign-in is enabled, Gitea accepts a user-supplied OpenID URL and performs discovery requests without validating the destination against internal network addresses. An unauthenticated remote attacker can cause the server to contact loopback or private-network HTTP services. This can expose internal service behavior and enable interaction with resources that are not directly reachable by the attacker.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":220322,"id":"CVE-2026-25946","ts":1791996225285,"field":"cvss","old":null,"new":"5.3"},{"seq":220321,"id":"CVE-2026-25946","ts":1791996225285,"field":"severity","old":"none","new":"medium"}]}