{"id":"CVE-2026-104955","revision":"ee7e8a4adda4475489ee7124b2819aa6","records":[{"revision":"ee7e8a4adda4475489ee7124b2819aa6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-104955","aliases":[],"title":"Plane: Project Member can escalate Project Guest to Member via PATCH /project-members/{pk} (BAC / Privilege Escalation)","description":"Plane is an open-source project management tool. Prior to 1.4.0, a Project Member with role 15 can send a PATCH request to the project-member update endpoint at /api/workspaces/{workspace_slug}/projects/{project_id}/members/{member_pk}/ to change another user's project role. The role-update logic blocks only a new role higher than the requester's role, so assigning the equal Member role bypasses the insufficient validation and promotes a Project Guest with role 5 to Member without Project Admin approval. This unauthorized promotion grants the guest the additional project capabilities associated with the Member role and allows a regular member to bypass project governance controls. This issue is fixed in 1.4.0.","state":0,"publishedAt":"2026-10-05T16:42:25.771+00:00","modifiedAt":"2026-10-07T20:52:04.227+00:00","affected":[{"ecosystem":"Vendor product","name":"plane","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"makeplane\",\n                    \"product\": \"plane\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.4.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/makeplane/plane/security/advisories/GHSA-x63v-p7wc-47x4","https://github.com/makeplane/plane/pull/9014","https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e","https://github.com/makeplane/plane/releases/tag/v1.4.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104955","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104955","identifiers":["CVE-2026-104955"]},"retained":false,"historicalAffected":[]}],"coverage":[]}