{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78433","assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","state":"PUBLISHED","assignerShortName":"Gitea","dateReserved":"2026-08-24T20:45:09.297Z","datePublished":"2026-10-14T14:38:17.247Z","dateUpdated":"2026-10-18T13:35:37.544Z"},"containers":{"cna":{"providerMetadata":{"orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","shortName":"Gitea","dateUpdated":"2026-10-14T14:38:17.247Z"},"title":"Gitea private attachment disclosure through repository mismatch","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Gitea","product":"Gitea","packageName":"gitea.dev","defaultStatus":"unaffected","versions":[{"version":"1.26.0","status":"affected","lessThanOrEqual":"1.27.2","versionType":"semver"}]}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq","name":"GitHub Security Advisory GHSA-frpv-2xgv-wxpq","tags":["vendor-advisory"]},{"url":"https://blog.gitea.com/release-of-1.27.3/","name":"Gitea 1.27.3 release announcement","tags":["release-notes"]},{"url":"https://github.com/go-gitea/gitea/pull/39048","name":"Fix: go-gitea/gitea pull request #39048","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/pull/39077","name":"Fix: go-gitea/gitea pull request #39077","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","name":"go-gitea/gitea v1.27.3 release","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-284","description":"CWE-284: Improper Access Control"},{"lang":"en","type":"CWE","cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key"},{"lang":"en","type":"CWE","cweId":"CWE-863","description":"CWE-863: Incorrect Authorization"},{"lang":"en","type":"CWE","cweId":"CWE-1220","description":"CWE-1220: Insufficient Granularity of Access Control"}]}],"credits":[{"lang":"en","value":"https://github.com/iabdullah215","type":"reporter"},{"lang":"en","value":"https://github.com/bircni","type":"remediation developer"},{"lang":"en","value":"https://github.com/silverwind","type":"remediation developer"}]},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-18T13:35:32.390912Z","id":"CVE-2026-78433","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-18T13:35:37.544Z"}}]}}