CVE-2026-104969

MEDIUM 6.5

Plane: Cross-Tenant Cycle Issue Hijack via IDOR

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-639
Vendor	makeplane
Product	plane
Published	Oct 5, 2026
Last Updated	Oct 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Affected Versions

makeplane / plane

< 1.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr github.com: https://github.com/makeplane/plane/pull/9269 github.com: https://github.com/makeplane/plane/commit/81d9873d7f1cf1d1252ed53c12dd33696be73a89 github.com: https://github.com/makeplane/plane/releases/tag/v1.4.0