Plane: Cross-Tenant Cycle Issue Hijack via IDOR

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104969
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-05 17:17:12 UTC
Updated2026-10-05 18:17:32 UTC
DescriptionPlane 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Makeplane Plane affected < 1.4.0 Not specified

References

ReferenceSourceLinkTags
github.com/makeplane/plane/releases/tag/v1.4.0 [email protected] github.com
github.com/makeplane/plane/security/advisories/GHSA-22g9-9xfv-q3fr 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/makeplane/plane/commit/81d9873d7f1cf1d1252ed53c12dd33696be73a89 [email protected] github.com
github.com/makeplane/plane/pull/9269 [email protected] github.com
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