CVE-2026-46386

criticalCVSS 9.9covered by 1 sourcefirst seen 2026-06-26

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 .

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Exploitation outlook

Low exploitation risk0.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalCVE-2026-46386: OpenProject is open-source, web-based project management software. Prior to , the official ope…nvd · 2026-06-26

External references

NVD record for CVE-2026-46386

CVE.org record

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