CVE-2026-46386

Critical

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 .

SeverityCritical

CVSS9.9

Exploit probability—

ProductOpf Openproject

PublishedJun 26, 2026

First seenJun 26, 2026

Weakness typeCWE-502Deserialization of untrusted data CWE-798Hard-coded credentials CWE-1188CWE-1188 CWE-1392CWE-1392

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
opf openproject	>= 8.3.0, < 17.2.4, >= 17.3.0, < 17.3.2	—

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