Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-57520— Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint

CVSS 7.1 · High EPSS 0.35% · P28

Possible ATT&CK Techniques 1AI

T1078.004 · Cloud Accounts

Affected Version Matrix 1

VendorProductVersion RangeStatus
bitwardenserver< 2026.5.0affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-57520

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Bitwarden Server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bitwarden server是美国Bitwarden公司开源的一款密码管理服务器软件。 Bitwarden Server 2026.5.0之前版本存在授权问题漏洞，该漏洞源于批量用户移除端点缺少角色层次检查，可能导致经过身份验证的具有ManageUsers权限的Custom用户移除组织中的Admin账户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
bitwardenserver 0 ~ 2026.5.0 -

II. Public POCs for CVE-2026-57520

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9034 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-57520

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-57520 (2)

Vendor Advisories for CVE-2026-57520 (1)

Security Blog Posts for CVE-2026-57520 (1)

Vendor Pages for CVE-2026-57520 (1)

Same Patch Batch · bitwarden · 2026-06-25 · 3 CVEs total

CVE-2026-575214.3 MEDIUMBitwarden Server < 2026.5.0 Broken Access Control via PreviewInvoiceController
CVE-2026-575223.5 LOWBitwarden Server < 2026.5.0 JSON Injection via Webhook Templates

IV. Related Vulnerabilities

Same product: server
Same vendor: bitwarden
Same weakness: CWE-862

V. Comments for CVE-2026-57520

No comments yet

Leave a comment