{"api_version":"1","generated_at":"2026-10-27T13:48:36+00:00","cve":"CVE-2026-78433","urls":{"html":"https://cve.report/CVE-2026-78433","api":"https://cve.report/api/cve/CVE-2026-78433.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-78433","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-78433"},"summary":{"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.","state":"PUBLISHED","assigner":"Gitea","published_at":"2026-10-14 15:17:25","updated_at":"2026-10-18 14:16:56"},"problem_types":["CWE-284","CWE-639","CWE-863","CWE-1220","CWE-284 CWE-284: Improper Access Control","CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key","CWE-863 CWE-863: Incorrect Authorization","CWE-1220 CWE-1220: Insufficient Granularity of Access Control"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","score":"5.9","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","score":"5.9","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"references":[{"url":"https://blog.gitea.com/release-of-1.27.3/","name":"https://blog.gitea.com/release-of-1.27.3/","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq","name":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","name":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/pull/39077","name":"https://github.com/go-gitea/gitea/pull/39077","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/go-gitea/gitea/pull/39048","name":"https://github.com/go-gitea/gitea/pull/39048","refsource":"88ee5874-cf24-4952-aea0-31affedb7ff2","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-78433","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78433","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Gitea","product":"Gitea","version":"affected 1.26.0 1.27.2 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"CNA","value":"https://github.com/iabdullah215","lang":"en"},{"source":"CNA","value":"https://github.com/bircni","lang":"en"},{"source":"CNA","value":"https://github.com/silverwind","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-78433","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-10-18T13:35:32.390912Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-10-18T13:35:37.544Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","packageName":"gitea.dev","product":"Gitea","vendor":"Gitea","versions":[{"lessThanOrEqual":"1.27.2","status":"affected","version":"1.26.0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"reporter","value":"https://github.com/iabdullah215"},{"lang":"en","type":"remediation developer","value":"https://github.com/bircni"},{"lang":"en","type":"remediation developer","value":"https://github.com/silverwind"}],"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."}],"problemTypes":[{"descriptions":[{"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","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-14T14:38:17.247Z","orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","shortName":"Gitea"},"references":[{"name":"GitHub Security Advisory GHSA-frpv-2xgv-wxpq","tags":["vendor-advisory"],"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq"},{"name":"Gitea 1.27.3 release announcement","tags":["release-notes"],"url":"https://blog.gitea.com/release-of-1.27.3/"},{"name":"Fix: go-gitea/gitea pull request #39048","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/39048"},{"name":"Fix: go-gitea/gitea pull request #39077","tags":["patch"],"url":"https://github.com/go-gitea/gitea/pull/39077"},{"name":"go-gitea/gitea v1.27.3 release","tags":["release-notes"],"url":"https://github.com/go-gitea/gitea/releases/tag/v1.27.3"}],"title":"Gitea private attachment disclosure through repository mismatch"}},"cveMetadata":{"assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","assignerShortName":"Gitea","cveId":"CVE-2026-78433","datePublished":"2026-10-14T14:38:17.247Z","dateReserved":"2026-08-24T20:45:09.297Z","dateUpdated":"2026-10-18T13:35:37.544Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-14 15:17:25","lastModifiedDate":"2026-10-18 14:16:56","problem_types":["CWE-284","CWE-639","CWE-863","CWE-1220","CWE-284 CWE-284: Improper Access Control","CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key","CWE-863 CWE-863: Incorrect Authorization","CWE-1220 CWE-1220: Insufficient Granularity of Access Control"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-18T13:35:32.390912Z","id":"CVE-2026-78433","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"78433","Ordinal":"1","Title":"Gitea private attachment disclosure through repository mismatch","CVE":"CVE-2026-78433","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"78433","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Gitea private attachment disclosure through repository mismatch"}]}}}