{"schema":"threatline.record/2","record":{"id":"CVE-2026-105633","aliases":["GHSA-5mxw-g5mw-3v3w"],"summary":"Plane: Issue Attachment Ownership Hijacking via Missing `issue_id` Scope","details":"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.","categories":["Unclassified"],"product":"plane","vendor":"makeplane","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105633","source_modified_at":"2026-10-05T18:22:11.592Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"plane","vendor":"makeplane","versions":[{"version":"< 1.4.0","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00299,"percentile":0.21419,"score_date":"2026-10-23"},"published_at":"2026-10-05T17:58:32.417Z","modified_at":"2026-10-05T18:22:11.592Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105633","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T18:22:11.592Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105633","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/makeplane/plane/security/advisories/GHSA-5mxw-g5mw-3v3w","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/pull/9315","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/commit/5829f0febf0739494d576b60d4943d10d236bc96","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-05T18:21:45.443968Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T18:22:11.592Z","content_hash":"e31676f8251b84e9678b377be71cc9db69fa4b392027090ce0ce8173aa043b4a"}}