HOMEVULNERABILITIESCVE-2026-57520
HIGH

CVE-2026-57520

CWE-862Published: June 25, 2026· Updated: Jun 30, 2026

7.1
CVSS v3.1
EPSS:0.28%probability of exploitation in 30 daysPercentile:19.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-57520 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Affected Vendors & Products

bitwarden1 product
server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4
PATCHhttps://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin
ADVISORYhttps://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint

All References (5)

→
https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4Patch
→
https://github.com/bitwarden/server/pull/7526Issue Tracking
→
https://github.com/bitwarden/server/releases/tag/v2026.5.0Release Notes
→
https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-adminExploit · Patch · Third Party Advisory
→
https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpointThird Party Advisory

Quick Facts

CVE IDCVE-2026-57520
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-862
CISA KEVNo
EPSS (30d)0.28%
Affected1 vendor
PublishedJun 25, 2026

Related CVEs (CWE-862)

CVE-2025-30416
10.0
CVE-2026-34976
10.0
CVE-2026-0092
10.0
CVE-2026-33712
10.0
CVE-2026-2031
10.0
CVE-2026-46425
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-57520 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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