{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-57520: Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-57520","status":"final","version":"1","initial_release_date":"2026-06-25T19:08:41.189Z","current_release_date":"2026-06-30T03:30:54.309Z","revision_history":[{"date":"2026-06-25T19:08:41.189Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-57520 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-57520"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-57520"},{"category":"external","summary":"sanjokkarki.com.np","url":"https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin"},{"category":"external","summary":"github.com","url":"https://github.com/bitwarden/server/releases/tag/v2026.5.0"},{"category":"external","summary":"github.com","url":"https://github.com/bitwarden/server/pull/7526"},{"category":"external","summary":"github.com","url":"https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4"},{"category":"external","summary":"vulncheck.com","url":"https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint"}]},"product_tree":{"branches":[{"category":"vendor","name":"bitwarden","branches":[{"category":"product_name","name":"server","branches":[{"category":"product_version_range","name":"<2026.5.0","product":{"name":"bitwarden server <2026.5.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-57520","title":"Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"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","baseScore":7.1,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 2026.5.0.","product_ids":["CSAFPID-1"],"url":"https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4"}]}]}