{"id":"CVE-2026-78433","summary":"Gitea private attachment disclosure through repository mismatch","details":"Gitea's web attachment handler skips its cross-repository ownership check for attachments created before 16 January 2026 and checks permissions against the repository named in the request URL instead. An unauthenticated attacker who knows a private attachment's UUID can request it through a public repository's attachment path and retrieve its contents. This can expose issue and pull request attachments or release assets; the random attachment UUID must already be known to the attacker.","aliases":["GHSA-frpv-2xgv-wxpq"],"modified":"2026-10-15T02:47:41.281834541Z","published":"2026-10-14T14:38:17.247Z","database_specific":{"cwe_ids":["CWE-1220","CWE-284","CWE-639","CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78433.json","cna_assigner":"Gitea"},"references":[{"type":"ADVISORY","url":"https://blog.gitea.com/release-of-1.27.3/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78433.json"},{"type":"FIX","url":"https://github.com/go-gitea/gitea/pull/39048"},{"type":"FIX","url":"https://github.com/go-gitea/gitea/pull/39077"},{"type":"ADVISORY","url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3"},{"type":"ADVISORY","url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78433"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/go-gitea/gitea","events":[{"introduced":"f09bea7af13bd00d07a34252468389d15de39a8d"},{"last_affected":"1dac1bb2f8593d4319125fa6bca9283000a2ddc2"}],"database_specific":{"extracted_events":[{"introduced":"1.26.0"},{"last_affected":"1.27.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.27.2","v1.27.1","v1.27.0","v1.27.0-rc0","v1.28.0-dev","v1.27.0-dev","v1.26.0-dev"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78433.json"}}],"schema_version":"1.9.0"}