---
id: CVE-2026-44731
title: 'OpenProject is open-source, web-based project management software'
summary: >-
  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,…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-639
published: '2026-06-26'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44731'
references:
  - url: 'https://github.com/opf/openproject/security/advisories/GHSA-x7j3-cfgf-7mc4'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00294
epssPercentile: 0.19515
ingestedAt: '2026-06-29T14:29:18.235Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.