{"id":"CVE-2026-78433","aliases":["EUVD-2026-101111","GHSA-frpv-2xgv-wxpq","GHSA-w7q4-4ccp-896r"],"status":"published","title":"Gitea private attachment disclosure through repository mismatch","description":"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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-07","score":0.00369,"percentile":0.30963,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1220","CWE-284","CWE-639","CWE-863"],"published":"2026-10-14T14:38:17Z","modified":"2026-10-28T02:30:26Z","products":[{"vendor":"gitea","product":"gitea"}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq","tags":["vendor-advisory","advisory"]},{"url":"https://blog.gitea.com/release-of-1.27.3/","tags":["release-notes","advisory"]},{"url":"https://github.com/go-gitea/gitea/pull/39048","tags":["patch","fix"]},{"url":"https://github.com/go-gitea/gitea/pull/39077","tags":["patch","fix"]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","tags":["release-notes","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78433","tags":["advisory"]},{"url":"https://blog.gitea.com/release-of-1.27.3"},{"url":"https://github.com/advisories/GHSA-w7q4-4ccp-896r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78433.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-78433","title":"Gitea private attachment disclosure through repository mismatch","description":"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.","status":"published","published":"2026-10-14T14:38:17.247Z","modified":"2026-10-18T13:35:37.544Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-284","CWE-639","CWE-863","CWE-1220"],"updated_at":"2026-11-02T13:34:48.658051Z"}],"euvd":[{"id":"EUVD-2026-101111","description":"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.","status":"published","published":"2026-10-14T14:38:17Z","modified":"2026-10-18T13:35:37Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:00:00.51681Z"}],"ghsa":[{"id":"GHSA-w7q4-4ccp-896r","title":"Gitea's web attachment handler skips its cross-repository ownership check for attachments created...","description":"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.","status":"published","published":"2026-10-14T15:32:30Z","modified":"2026-10-18T15:30:26Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:13:54.841211Z"}],"nvd":[{"id":"CVE-2026-78433","description":"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.","status":"published","published":"2026-10-14T15:17:25.637Z","modified":"2026-10-18T14:16:56.5Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-284","CWE-639","CWE-863","CWE-1220"],"updated_at":"2026-11-02T14:12:58.99337Z"}],"osv":[{"id":"CVE-2026-78433","title":"Gitea private attachment disclosure through repository mismatch","description":"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.","status":"published","published":"2026-10-14T14:38:17.247Z","modified":"2026-10-28T02:30:26.879191789Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-1220","CWE-284","CWE-639","CWE-863"],"updated_at":"2026-11-02T15:45:17.44708Z"}]}}