CVE-2026-104967: CWE-639: Authorization Bypass Through User-Controlled Key in makeplane plane
Description
Plane is an open-source project management tool. Prior to 1.4.0, BulkDeleteIssuesEndpoint and SubIssuesEndpoint in apps/api/plane/app/views/issue/ accept body- or URL-supplied issue IDs and operate on them without checking that the IDs belong to the caller's workspace and project. The permission decorator on each endpoint validates only that the caller is a member or administrator of the workspace and project named in the URL. BulkDeleteIssuesEndpoint can destroy CycleIssue and ModuleIssue associations belonging to foreign issues. SubIssuesEndpoint can re-parent foreign issues under an attacker-selected issue and return the foreign issues' metadata. This issue is fixed in 1.4.0.
CVSS v3.1
Score 5.4medium
Affected software
makeplane
plane
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-104967 describes an authorization bypass in the Plane project management tool before version 1.4.0. The BulkDeleteIssuesEndpoint and SubIssuesEndpoint endpoints accept issue IDs supplied via request body or URL parameters but only verify that the caller is a member or administrator of the workspace and project specified in the URL, not that the issue IDs belong to that workspace/project. This flaw allows an attacker to delete associations of issues they do not own and to re-parent foreign issues under attacker-controlled issues, also exposing metadata of those foreign issues. The vulnerability is addressed in Plane version 1.4.0.
Potential Impact
An attacker who is a member or administrator of a workspace can bypass authorization checks to delete or manipulate issues outside their authorized projects. This leads to unauthorized data modification and information disclosure of issue metadata from foreign projects within the same workspace. The impact is limited to confidentiality and integrity with no reported availability impact.
Mitigation Recommendations
Upgrade Plane to version 1.4.0 or later, where this authorization bypass vulnerability is fixed. No other mitigation is specified or required as the fix addresses the root cause.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-02T18:16:13.629Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac3d88d2cdf04f6562043ab
Added to database: 10/05/2026, 17:04:13 UTC
Last enriched: 10/05/2026, 17:18:43 UTC
Last updated: 10/05/2026, 19:04:09 UTC
Views: 13
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