CVE-2026-104956: CWE-943: Improper Neutralization of Special Elements in Data Query Logic in makeplane plane
Description
Plane is an open-source project management tool. Prior to 1.4.0, the unauthenticated public issues endpoint accepts group_by and sub_group_by query parameters and passes them without an allowlist to grouped paginators, where they are used as ORM field names by F(field), .values(field), .order_by(field), and Window partition_by operations. An anonymous attacker can supply arbitrary field paths that trigger an unhandled FieldError or KeyError and an HTTP 500 response, or force the ORM to resolve __-separated relational paths as a blind traversal oracle. This is the same field-name injection class addressed by earlier order_by sanitization, but that remediation left group_by and sub_group_by unvalidated. The issue does not directly disclose column values because issue_group_values() returns an empty list for unknown fields, the result projection uses a fixed required_fields list, and the subgrouped path raises KeyError before serialization. This issue is fixed in 1.4.0.
CVSS v3.1
Score 5.3medium
Affected software
makeplane
plane
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Plane versions before 1.4.0 involves improper neutralization of special elements in data query logic (CWE-943). The unauthenticated public issues endpoint accepts group_by and sub_group_by parameters without an allowlist, passing them to grouped paginators that use these parameters as ORM field names in operations like F(field), .values(field), .order_by(field), and Window partition_by. An attacker can supply arbitrary field paths causing unhandled FieldError or KeyError exceptions leading to HTTP 500 responses or force the ORM to resolve relational paths as a blind traversal oracle. Earlier fixes addressed order_by sanitization but left group_by and sub_group_by unvalidated. The issue does not disclose column values due to fixed required_fields and error handling. The vulnerability is resolved in Plane version 1.4.0.
Potential Impact
An anonymous attacker can cause denial of service by triggering unhandled exceptions resulting in HTTP 500 errors. The vulnerability does not lead to direct data disclosure or integrity impact but could be used as a blind traversal oracle. The CVSS score is 5.3 (medium severity) with no confidentiality or integrity impact, only availability impact.
Mitigation Recommendations
This vulnerability is fixed in Plane version 1.4.0. Users should upgrade to version 1.4.0 or later to remediate this issue. No other mitigation is indicated or necessary as the fix addresses the root cause.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-02T18:16:13.628Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac3d88f2cdf04f6562043c4
Added to database: 10/05/2026, 17:04:15 UTC
Last enriched: 10/05/2026, 17:18:26 UTC
Last updated: 10/05/2026, 19:34:03 UTC
Views: 13
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