{"schema_version":"1.9.0","id":"CVE-2026-20912","published":"2026-01-22T22:01:52.026Z","modified":"2026-08-12T03:51:43.766470223Z","aliases":["BIT-gitea-2026-20912","GHSA-4xx9-vc8v-87hv","GHSA-vfmv-f93v-37mw","GO-2026-4364"],"related":["SUSE-SU-2026:0403-1","openSUSE-SU-2026:21483-1"],"summary":"Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure","details":"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 unauthorized users.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/go-gitea/gitea","events":[{"introduced":"0"},{"fixed":"369830bada2fd8826a5135cb2fc66660a9bef708"}],"database_specific":{"cpe":"cpe:2.3:a:gitea:gitea:*:*:*:*:*:-:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.25.3"},{"fixed":"1.25.4"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v1.25.3","v1.25.2","v1.25.1","v1.25.0","v1.25.0-rc0","v1.26.0-dev","v1.25.0-dev","v1.24.0-dev","v1.22.0-rc1","v1.23.0-dev","v1.22.0-rc0","v1.21.0-rc0","v1.22.0-dev","v1.20.0-rc0","v1.21.0-dev","v1.20.0-dev","v1.19.0-rc0","v1.18.0-rc0","v1.19.0-dev","v1.18.0-dev","v1.17.0-dev","v1.16.0-rc1","v1.15.0-rc1","v1.16.0-dev","v1.15.0-dev","v1.14.0-dev","v1.13.0-dev","v1.12.0-dev","v1.10.5","v1.11.0-rc1","v1.10.0-rc1","v1.11.0-dev","v1.9.0-rc1","v1.10.0-dev","v1.9.0-dev","v1.7.0-dev","v1.6.0-rc1","v1.6.0-dev","v1.5.0-rc1","v1.5.0-dev","v1.1.0","v1.0.0","v0.9.99"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-20912.json"}}],"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-20912"},{"type":"ADVISORY","url":"https://blog.gitea.com/release-of-1.25.4/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20912.json"},{"type":"ADVISORY","url":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4"},{"type":"ADVISORY","url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20912"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2432219"},{"type":"FIX","url":"https://github.com/go-gitea/gitea/pull/36320"},{"type":"FIX","url":"https://github.com/go-gitea/gitea/pull/36355"}],"database_specific":{"cna_assigner":"Gitea","cwe_ids":["CWE-284","CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/20xxx/CVE-2026-20912.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}