{"id":"CVE-2026-104636","title":"Gitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination","summary":"Gitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination. A repository adm…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-918"],"vendor":"Gitea","product":"gitea.dev","affected":["gitea.dev <= 1.27.3"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T21:17:09.133","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104636","references":[{"url":"https://blog.gitea.com/release-of-28.0.0/","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/39426","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v28.0.0","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-g4hw-fg4c-89mq","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"}],"tags":["nvd","cve.org"],"epss":0.00148,"epssPercentile":0.03493,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-07T20:13:39.303785Z"},"ingestedAt":"2026-10-06T20:16:42.496Z","slug":"CVE-2026-104636","body":"## Overview\n\nGitea validated the initial remote URL for push mirrors, wiki remote checks, and fetches of migrated pull request heads, but the subsequent raw Git operations followed HTTP redirects without revalidating the destination. A repository administrator using a policy-allowed endpoint that redirects could make Gitea's Git client send requests to an address that the outbound host policy would otherwise block. The impact depends on the configured policy and the internal services reachable from the server.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217751,"id":"CVE-2026-104636","ts":1791406430966,"field":"cvss","old":null,"new":"7.5"},{"seq":217750,"id":"CVE-2026-104636","ts":1791406430966,"field":"severity","old":"none","new":"high"}]}