{"schema":"threatline.record/2","record":{"id":"CVE-2026-104955","aliases":["GHSA-x63v-p7wc-47x4"],"summary":"Plane: Project Member can escalate Project Guest to Member via PATCH /project-members/{pk} (BAC / Privilege Escalation)","details":"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.","categories":["Unclassified"],"product":"plane","vendor":"makeplane","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104955","source_modified_at":"2026-10-07T20:52:04.227Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"plane","vendor":"makeplane","versions":[{"version":"< 1.4.0","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.4,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0019,"percentile":0.08239,"score_date":"2026-10-23"},"published_at":"2026-10-05T16:42:25.771Z","modified_at":"2026-10-07T20:52:04.227Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104955","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-07T20:52:04.227Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104955","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-x63v-p7wc-47x4","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/pull/9014","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/makeplane/plane/commit/4c1bdd1d625fa3f1141e8af9c15423946472069e","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":"2026-10-07T20:51:39.176412Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T20:52:04.227Z","content_hash":"f4bde46087bb8561cce6ebf3789d9746715093574f7eb4cc94fb1cee0bdbd281"}}