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.
History

Mon, 05 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Makeplane
Makeplane plane
Vendors & Products Makeplane
Makeplane plane

Mon, 05 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 05 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Plane: Cross-Tenant Cycle Issue Hijack via IDOR
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-05T16:57:52.957Z

Updated: 2026-10-05T17:48:30.635Z

Reserved: 2026-10-02T18:16:13.629Z

Link: CVE-2026-104969

cve-icon Vulnrichment

Updated: 2026-10-05T17:48:17.128Z

cve-icon NVD

Status : Deferred

Published: 2026-10-05T17:17:12.783

Modified: 2026-10-05T18:17:32.003

Link: CVE-2026-104969

cve-icon Redhat

No data.