{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-46386: OpenProject: Pre-authentication RCE in openproject/openproject Docker image via default `SECRET_KEY_BASE=OVERWRITE_ME` and `cookies_serializer = :marshal`","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-46386","status":"final","version":"1","initial_release_date":"2026-06-26T19:26:39.961Z","current_release_date":"2026-06-26T19:26:39.961Z","revision_history":[{"date":"2026-06-26T19:26:39.961Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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 .","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-46386 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-46386"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-46386"},{"category":"external","summary":"https://github.com/opf/openproject/security/advisories/GHSA-r85r-gjq2-f83r","url":"https://github.com/opf/openproject/security/advisories/GHSA-r85r-gjq2-f83r"}]},"product_tree":{"branches":[{"category":"vendor","name":"opf","branches":[{"category":"product_name","name":"openproject","branches":[{"category":"product_version","name":">= 8.3.0, < 17.2.4","product":{"name":"opf openproject >= 8.3.0, < 17.2.4","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:opf:openproject:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":">= 17.3.0, < 17.3.2","product":{"name":"opf openproject >= 17.3.0, < 17.3.2","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:opf:openproject:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-46386","title":"OpenProject: Pre-authentication RCE in openproject/openproject Docker image via default `SECRET_KEY_BASE=OVERWRITE_ME` and `cookies_serializer = :marshal`","notes":[{"category":"description","text":"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 .","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","baseScore":9.9,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1","CSAFPID-2"]}]}]}