{"id":"CVE-2026-57520","summary":"Bitwarden Server \u003c 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint","details":"Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in the bulk user-remove endpoint. Attackers can supply Admin organization-user IDs in a bulk DELETE request to bypass the guard enforced on the single-user removal path, effectively removing one or more Admin accounts from an organization.","modified":"2026-07-16T03:30:53.719977104Z","published":"2026-06-25T19:08:41.189Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57520.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57520.json"},{"type":"ADVISORY","url":"https://github.com/bitwarden/server/releases/tag/v2026.5.0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57520"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint"},{"type":"REPORT","url":"https://github.com/bitwarden/server/pull/7526"},{"type":"FIX","url":"https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4"},{"type":"PACKAGE","url":"https://github.com/bitwarden/server"},{"type":"EVIDENCE","url":"https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bitwarden/server","events":[{"introduced":"0"},{"fixed":"c3cabffccfe35004f5022f91f95cc0fb5e8aa7c4"},{"fixed":"901bb67157c0f80d369c40b76742fdf7623da4e4"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2026.5.0"}]}}],"versions":["v2025.10.1","v2025.8.1","v2025.7.1","v2024.10.1","v2024.8.1","v2024.8.0","v2024.5.0","v2024.2.3","v2024.1.2","v1.39.0","v1.38.2","v1.38.1","v1.38.0","v1.37.2","v1.37.1","v1.37.0","v1.36.1","v1.36.0","v1.35.1","v1.35.0","v1.34.0","v1.33.1","v1.33.0","v1.32.0","v1.31.1","v1.31.0","v1.30.4","v1.30.3","v1.30.2","v1.30.1","v1.30.0","v1.29.0","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.0","v1.23.0","1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.2","v1.17.1","v1.17.0","v1.16.0","v1.15.1","v1.15.0","v1.14.2","v1.14.1","v1.14.0","v1.13.1","v1.13.0","v1.12.1","v1.12.0","v1.11.1","v1.11.0","v1.10.0","v1.9.0","v1.8.2","v1.8.1","v1.8.0","v1.7.0","v1.6.0","v1.5.1","v1.5.0","v1.4.1","1.4.0","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57520.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N"}]}