CVE-2026-102985

Plane is an open-source project management tool. In 1.3.1 and earlier, ProjectMemberViewSet.partial_update places its authorization checks inside the role update branch, so a guest or member can omit role and change another ProjectMember record's is_active field, including deactivating a project administrator. ProjectMemberPreferenceEndpoint.patch separately trusts the member_id path value and lets a project member overwrite another member's preferences. These missing object-level authorization checks permit membership disruption and cross-member preference tampering. The vulnerability is fixed in 1.4.0.

• CWE-862

• https://github.com/makeplane/plane/commit/dc9d80b2d2a499b967f0b541e083b283f463719f
• https://github.com/makeplane/plane/pull/9367
• https://github.com/makeplane/plane/releases/tag/v1.4.0
• https://github.com/makeplane/plane/security/advisories/GHSA-25gg-cxm8-g7h9
• https://github.com/makeplane/plane/security/advisories/GHSA-25gg-cxm8-g7h9

Published

Oct 14, 2026

Last Modified

Oct 20, 2026

Status

Deferred

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