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Vulnerability record · CVE-2026-46386 · published 26 June 2026

CVE-2026-46386: Deserialization of untrusted data vulnerability

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 .

9.9 CVSS 3.1 Critical EPSS 0.49% · top 60.3% CWE-502 · Deserialization of untrusted dataCWE-798 · Hard-coded credentials Deferred
9.9CVSS 3.1 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
29 Jun 2026Last modified by NVD

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 .

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-46386), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.