---
id: CVE-2026-46386
title: 'OpenProject is open-source, web-based project management software'
summary: >-
  OpenProject is open-source, web-based project management software. Prior to ,
  the official openproject/openproject Docker image ships ENV
  SECRET_KEY_BASE=OVERWRITE_ME as the default Rails master key. Combined with
  cookies_serializer = :m…
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-502
  - CWE-798
  - CWE-1188
  - CWE-1392
published: '2026-06-26'
updated: '2026-06-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46386'
references:
  - url: 'https://github.com/opf/openproject/security/advisories/GHSA-r85r-gjq2-f83r'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.0049
epssPercentile: 0.39496
ingestedAt: '2026-06-29T14:29:18.245Z'
---

## Overview

OpenProject is open-source, web-based project management software. Prior to , the official openproject/openproject Docker image ships ENV SECRET_KEY_BASE=OVERWRITE_ME as the default Rails master key. Combined with cookies_serializer = :marshal, this gives any logged-in user a deterministic Marshal-deserialization path reachable via the /my/two_factor_devices cookie reader This vulnerability is fixed in .

## Remediation

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