{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105633","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-05T16:40:39.611Z","datePublished":"2026-10-05T17:58:32.417Z","dateUpdated":"2026-10-05T18:22:11.592Z"},"containers":{"cna":{"title":"Plane: Issue Attachment Ownership Hijacking via Missing `issue_id` Scope","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w","tags":["x_refsource_CONFIRM"],"url":"https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w"},{"name":"https://github.com/makeplane/plane/pull/9315","tags":["x_refsource_MISC"],"url":"https://github.com/makeplane/plane/pull/9315"},{"name":"https://github.com/makeplane/plane/commit/5829f0febf0739494d576b60d4943d10d236bc96","tags":["x_refsource_MISC"],"url":"https://github.com/makeplane/plane/commit/5829f0febf0739494d576b60d4943d10d236bc96"},{"name":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":["x_refsource_MISC"],"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0"}],"affected":[{"vendor":"makeplane","product":"plane","versions":[{"version":"< 1.4.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-05T17:58:32.417Z"},"descriptions":[{"lang":"en","value":"Plane is an open-source project management tool. Prior to 1.4.0, the V2 issue-attachment PATCH endpoint accepts issue_id in the URL but omits it from the database query. A project member can use an issue_id they control in the URL while targeting another user's attachment by its pk UUID. Because the server matches only pk, workspace, and project_id, it modifies the attachment regardless of the issue_id in the URL. When the attachment is pending and has not been confirmed as uploaded, the PATCH handler sets created_by = request.user and transfers attachment ownership to the attacker. This issue is fixed in 1.4.0."}],"source":{"advisory":"GHSA-5mxw-g5mw-3v3w","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-05T18:21:45.443968Z","id":"CVE-2026-105633","options":[{"Exploitation":"poc"},{"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":"2026-10-05T18:22:11.592Z"}}]}}