CVE-2026-46386

OpenProject: Pre-authentication RCE in openproject/openproject Docker image via default `SECRET_KEY_BASE=OVERWRITE_ME` and `cookies_serializer = :marshal`

State: Published
Severity: 9.9 Critical
Published: Jun 26, 2026
Updated: Jun 29, 2026
Reserved: May 13, 2026

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Description

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 .

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-502 Deserialization of Untrusted Data
CWE-798 Use of Hard-coded Credentials
CWE-1188 Insecure Default Initialization of Resource
CWE-1392 Use of Default Credentials

Affected Products

Product	Versions
openprojectopf	>= 8.3.0, < 17.2.4Affected >= 17.3.0, < 17.3.2Affected

References

https://github.com/opf/openproject/security/advisories/GHSA-r85r-gjq2-f83r

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