Is CVE-2026-57520 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57520 being exploited in the wild.

How severe is CVE-2026-57520?

High severity, with a CVSS score of 7.1, published 25 June 2026.

Which products and versions are affected?

Bitwarden Server before 2026.5.0.

Is there a fix for CVE-2026-57520?

A patch was published on 2026-04-23: Fix merged into main branch via PR #7526 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-57520 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-57520?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57520: Bitwarden Server privilege escalation in bulk user removal endpoint

CVE-2026-57520 · Severity: high · CVSS 7.1 · Published 2026-06-25

Bitwarden Server, the backend for the popular password management platform, contained a flaw that allowed certain lower-privileged users to remove administrators from an organization. Specifically, users with 'Custom' permissions and the ability to manage users could bypass security restrictions by using a 'bulk delete' feature instead of the standard single-user removal tool. This could allow an attacker to disrupt organization management or lock out legitimate administrators, potentially leading to a loss of administrative control over the password vault.

Quick answers

Is CVE-2026-57520 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57520 being exploited in the wild.
How severe is CVE-2026-57520?: High severity, with a CVSS score of 7.1, published 25 June 2026.
Which products and versions are affected?: Bitwarden Server before 2026.5.0.
Is there a fix for CVE-2026-57520?: A patch was published on 2026-04-23: Fix merged into main branch via PR #7526 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57520 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-57520?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A privilege escalation vulnerability exists in Bitwarden Server due to a missing role hierarchy check in the bulk user removal endpoint (`DELETE /api/organizations/{orgId}/users`). While the single-user removal path correctly enforces a guard preventing 'Custom' users from deleting 'Admin' users, the bulk removal path (`RemoveUsersInternalAsync`) failed to implement the same check. An authenticated attacker with 'ManageUsers' permissions can obtain Admin organization-user IDs and include them in a bulk DELETE request to successfully remove one or more Admin accounts. This bypasses the intended authorization logic that restricts Custom users from affecting higher-privileged roles. The issue is fixed in version 2026.5.0 by adding the missing role validation to the bulk removal loop.

Affected products

Bitwarden Server before 2026.5.0

Timeline

2026-04-23: patched: Fix merged into main branch via PR #7526
2026-05-29: advisory: Version 2026.5.0 released
2026-06-25: disclosed: CVE-2026-57520 published

References

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