What is CVE-2026-104969?

CVE-2026-104969 is a medium-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-05.

How severe is CVE-2026-104969?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Makeplane Plane

CVE-2026-104969

Plane is an open-source project management tool. Prior to 1.4.0, the cycle-issues endpoint accepts issue UUIDs in the request body without validating that they belong to the caller's workspace. An authenticated user can add issues from any workspace to a cycle they control. If a victim issue is already assigned to a cycle, the operation removes it from the victim's cycle, causing a destructive cross-tenant write. This issue is fixed in 1.4.0.

Vulnerability class: IDOR (Insecure Direct Object Reference)

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-104969?: CVE-2026-104969 is a medium-severity vulnerability in Makeplane Plane, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-05.
How severe is CVE-2026-104969?: Medium severity. CVSS v3 base score is 6.5 out of 10.