Auth bypass in Makeplane Plane
CVE-2026-104971
Plane is an open-source project management tool. Prior to 1.4.0, DuplicateAssetEndpoint fetches a source FileAsset without limiting it to the caller's workspace, allowing cross-workspace asset duplication. WorkspaceFileAssetEndpoint and the legacy FileAssetEndpoint omit workspace authorization, allowing authenticated users to read, create, modify, or delete assets in workspaces where they are not members. Separately, WorkspaceViewViewSet.retrieve lacks the authorization decorator used by its sibling actions, exposing an unauthorized workspace-view read surface. This issue is fixed in 1.4.0.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Makeplane Plane — versions < 1.4.0
Weakness classification (CWE)
References
- github.com/makeplane/plane/security/advisories/GHSA-p57q-8hh8-7fc7
- github.com/makeplane/plane/pull/8885
- github.com/makeplane/plane/pull/9288
- github.com/makeplane/plane/commit/4577dc3f7a6b5a198602b602a45c6b0abdc7204b
- github.com/makeplane/plane/commit/ac11c3ef7939e31201fa92a17de106906025590f
- github.com/makeplane/plane/releases/tag/v1.4.0
Frequently asked questions
- What is CVE-2026-104971?
- CVE-2026-104971 is a high-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.5/10. Published 2026-10-05.
- How severe is CVE-2026-104971?
- High severity. CVSS v3 base score is 8.5 out of 10.