What is CVE-2026-104961?

CVE-2026-104961 is a medium-severity vulnerability in Makeplane Plane, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-10-05.

How severe is CVE-2026-104961?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Makeplane Plane

CVE-2026-104961

Plane is an open-source project management tool. Prior to 1.4.0, WorkspaceOwnerPermission does not require is_active=True when checking whether a user is a workspace owner. A deactivated user can therefore remain authorized as the workspace owner and retain owner-level access. This issue is fixed in 1.4.0.

Vulnerability class: Broken Access Control

Published 2026-10-05 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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)

CWE-863 — Incorrect Authorization

References

Frequently asked questions

What is CVE-2026-104961?: CVE-2026-104961 is a medium-severity vulnerability in Makeplane Plane, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-10-05.
How severe is CVE-2026-104961?: Medium severity. CVSS v3 base score is 5.4 out of 10.