{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20736","assignerOrgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","state":"PUBLISHED","assignerShortName":"Gitea","dateReserved":"2026-01-08T23:02:37.558Z","datePublished":"2026-01-22T22:01:49.678Z","dateUpdated":"2026-01-23T21:54:48.862Z"},"containers":{"cna":{"affected":[{"vendor":"Gitea","product":"Gitea Open Source Git Server","versions":[{"version":"0","lessThanOrEqual":"1.25.3","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}]}],"references":[{"url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-jr6h-pwwp-c8g6","name":"GitHub Security Advisory","tags":["vendor-advisory"]},{"url":"https://github.com/go-gitea/gitea/pull/36320","name":"GitHub Pull Request #36320","tags":["patch"]},{"url":"https://github.com/go-gitea/gitea/releases/tag/v1.25.4","name":"Gitea v1.25.4 Release","tags":["release-notes"]},{"url":"https://blog.gitea.com/release-of-1.25.4/","name":"Gitea v1.25.4 Release Blog Post","tags":["release-notes"]}],"credits":[{"lang":"en","value":"spingARbor","type":"reporter"}],"title":"Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check","providerMetadata":{"orgId":"88ee5874-cf24-4952-aea0-31affedb7ff2","shortName":"Gitea","dateUpdated":"2026-01-22T22:01:49.678Z"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-01-23T21:13:08.431490Z","id":"CVE-2026-20736","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-01-23T21:54:48.862Z"}}]}}