How severe is CVE-2026-57520?

CVE-2026-57520 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.

Is CVE-2026-57520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-57520?

CVE-2026-57520 affects Bitwarden Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-57520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-57520 have an EU (EUVD) identifier?

Yes. CVE-2026-57520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39541.

When was CVE-2026-57520 published?

CVE-2026-57520 was published on 2026-06-25 and last updated on 2026-06-30.

CVE-2026-57520

CVE-2026-57520 is a high-severity vulnerability in Bitwarden Server with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v4: 7.1
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39541
Weakness: CWE-862
Affected product: Bitwarden Server
Published: 2026-06-25
Last modified: 2026-06-30

Description

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.

Frequently asked questions

What is CVE-2026-57520?: 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.
How severe is CVE-2026-57520?: CVE-2026-57520 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability low.
Is CVE-2026-57520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-57520?: CVE-2026-57520 affects Bitwarden Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-57520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-57520 have an EU (EUVD) identifier?: Yes. CVE-2026-57520 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39541.
When was CVE-2026-57520 published?: CVE-2026-57520 was published on 2026-06-25 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*

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