CVE-2026-39374: CWE-639: Authorization Bypass Through User-Controlled Key in makeplane plane
CVE-2026-39374 is an authorization bypass vulnerability in the open-source project management tool Plane prior to version 1. 3. 0. It allows project members with ADMIN or MEMBER roles to modify the start_date and target_date of any issue across the entire Plane instance, regardless of workspace or project membership. This occurs because the IssueBulkUpdateDateEndpoint fetches issues by ID without filtering by workspace or project, enabling unauthorized cross-boundary data modification. The vulnerability is fixed in Plane version 1. 3. 0.
AI Analysis
Technical Summary
Plane versions before 1.3.0 contain an authorization bypass vulnerability (CWE-639) in the IssueBulkUpdateDateEndpoint. This endpoint permits project members (ADMIN or MEMBER) to update the start_date and target_date fields of any issue in the Plane instance without verifying if the user belongs to the workspace or project of the issue. The lack of proper filtering by workspace or project allows unauthorized modification of issues beyond the user's authorized scope. This issue is resolved in version 1.3.0 of Plane.
Potential Impact
An attacker with project member privileges can modify the scheduling dates of issues outside their authorized projects or workspaces, potentially disrupting project timelines and data integrity. The vulnerability does not impact confidentiality or availability but has a high impact on data integrity within the Plane instance.
Mitigation Recommendations
Upgrade Plane to version 1.3.0 or later, where this authorization bypass vulnerability has been fixed. Since no official patch link or advisory is provided, users should verify the version and apply the update accordingly. Patch status is not yet confirmed by a vendor advisory; check the official Plane project resources for the latest remediation guidance.
CVE-2026-39374: CWE-639: Authorization Bypass Through User-Controlled Key in makeplane plane
Description
CVE-2026-39374 is an authorization bypass vulnerability in the open-source project management tool Plane prior to version 1. 3. 0. It allows project members with ADMIN or MEMBER roles to modify the start_date and target_date of any issue across the entire Plane instance, regardless of workspace or project membership. This occurs because the IssueBulkUpdateDateEndpoint fetches issues by ID without filtering by workspace or project, enabling unauthorized cross-boundary data modification. The vulnerability is fixed in Plane version 1. 3. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Plane versions before 1.3.0 contain an authorization bypass vulnerability (CWE-639) in the IssueBulkUpdateDateEndpoint. This endpoint permits project members (ADMIN or MEMBER) to update the start_date and target_date fields of any issue in the Plane instance without verifying if the user belongs to the workspace or project of the issue. The lack of proper filtering by workspace or project allows unauthorized modification of issues beyond the user's authorized scope. This issue is resolved in version 1.3.0 of Plane.
Potential Impact
An attacker with project member privileges can modify the scheduling dates of issues outside their authorized projects or workspaces, potentially disrupting project timelines and data integrity. The vulnerability does not impact confidentiality or availability but has a high impact on data integrity within the Plane instance.
Mitigation Recommendations
Upgrade Plane to version 1.3.0 or later, where this authorization bypass vulnerability has been fixed. Since no official patch link or advisory is provided, users should verify the version and apply the update accordingly. Patch status is not yet confirmed by a vendor advisory; check the official Plane project resources for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-06T21:29:17.350Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d56287aaed68159a58f97e
Added to database: 4/7/2026, 8:01:11 PM
Last enriched: 4/15/2026, 3:58:09 PM
Last updated: 5/23/2026, 4:42:35 AM
Views: 52
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