{"id":"CVE-2026-20912","title":"Gitea does not properly validate repository ownership when linking attachments to releases","summary":"Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-284","CWE-639","CWE-283"],"vendor":"gitea","product":"gitea","affected":["gitea < 1.25.4"],"patched":["gitea 1.25.4"],"published":"2026-01-22","updated":"2026-06-27","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-20912","references":[{"url":"https://blog.gitea.com/release-of-1.25.4/","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/36320","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/pull/36355","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw","label":"88ee5874-cf24-4952-aea0-31affedb7ff2"},{"url":"https://access.redhat.com/security/cve/CVE-2026-20912","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2432219","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00462,"epssPercentile":0.39142,"ingestedAt":"2026-06-29T13:24:34.632Z","slug":"CVE-2026-20912","body":"## Overview\n\nGitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.\n\n## Affected\n\n- `gitea < 1.25.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `gitea 1.25.4`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}