CVE-2026-44731: CWE-639: Authorization Bypass Through User-Controlled Key in opf openproject
OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the web application's meetings filter feature leaks whether a given user ID corresponds to a valid account and discloses the user's full name, allowing an attacker to enumerate all existing user accounts by probing user IDs and observing differences in the server response. This vulnerability is fixed in 17.3.2 and 17.4.0.
AI Analysis
Technical Summary
CVE-2026-44731 is an authorization bypass vulnerability (CWE-639) in OpenProject's meetings filter feature. Before versions 17.3.2 and 17.4.0, the application leaks information about user IDs by revealing whether a given user ID corresponds to a valid account and disclosing the full name of that user. This information disclosure allows attackers to enumerate existing user accounts by sending requests with different user IDs and observing differences in server responses. The vulnerability is resolved in OpenProject versions 17.3.2 and 17.4.0.
Potential Impact
An attacker with at least low privileges can enumerate valid user accounts and obtain full names of users. This information disclosure could facilitate further targeted attacks or social engineering but does not directly impact data integrity or availability.
Mitigation Recommendations
Upgrade OpenProject to version 17.3.2 or 17.4.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-44731: CWE-639: Authorization Bypass Through User-Controlled Key in opf openproject
Description
OpenProject is open-source, web-based project management software. Prior to 17.3.2 and 17.4.0, the web application's meetings filter feature leaks whether a given user ID corresponds to a valid account and discloses the user's full name, allowing an attacker to enumerate all existing user accounts by probing user IDs and observing differences in the server response. This vulnerability is fixed in 17.3.2 and 17.4.0.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/opf/openprojectRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-44731 is an authorization bypass vulnerability (CWE-639) in OpenProject's meetings filter feature. Before versions 17.3.2 and 17.4.0, the application leaks information about user IDs by revealing whether a given user ID corresponds to a valid account and disclosing the full name of that user. This information disclosure allows attackers to enumerate existing user accounts by sending requests with different user IDs and observing differences in server responses. The vulnerability is resolved in OpenProject versions 17.3.2 and 17.4.0.
Potential Impact
An attacker with at least low privileges can enumerate valid user accounts and obtain full names of users. This information disclosure could facilitate further targeted attacks or social engineering but does not directly impact data integrity or availability.
Mitigation Recommendations
Upgrade OpenProject to version 17.3.2 or 17.4.0 or later, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-07T18:04:17.309Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3edc0372d29f1837f4649b
Added to database: 06/26/2026, 20:07:31 UTC
Last enriched: 07/03/2026, 22:29:56 UTC
Last updated: 08/10/2026, 00:41:16 UTC
Views: 59
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