CVE-2026-55095: CWE-862: Missing Authorization in opf openproject
Description
CVE-2026-55095 is a medium severity vulnerability in OpenProject, an open-source project management software. In versions 17.5.1 and earlier, authenticated non-admin project members can access a read-only dialog that reveals hidden comment text of a raw custom project field. This disclosure does not include the custom field's value nor does it allow modification. The issue is fixed in version 17.6.0.
CVSS v4.0
Score 5.3medium
Affected software
opf
openproject
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenProject versions up to 17.5.1 contain a missing authorization vulnerability (CWE-862) where authenticated non-admin project members can request the inplace-edit dialog for a raw custom_field_ project attribute. The dialog resolves the project custom field by its raw identifier without enforcing the admin_only visibility scope, resulting in disclosure of hidden comment text in read-only mode. The vulnerability does not expose the custom field value or permit any write or mutation operations. The flaw is addressed in OpenProject version 17.6.0.
Potential Impact
The vulnerability allows disclosure of hidden comment text associated with project custom fields to authenticated non-admin users. There is no disclosure of the actual custom field values and no ability to modify data. This limits the impact to information disclosure of comments only.
Mitigation Recommendations
Upgrade OpenProject to version 17.6.0 or later where this authorization issue is fixed. No other mitigation is required as the vendor has provided an official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T14:41:54.578Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a872d78acd9273b49dd4186
Added to database: 08/20/2026, 16:38:16 UTC
Last enriched: 09/11/2026, 04:33:28 UTC
Last updated: 10/05/2026, 06:48:17 UTC
Views: 73
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