EUVD-2026-29130
GHSA-vvm4-hc77-cqmc
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – May 11, 2026
Bitwarden Server prior to v2026.4.1 allows any authenticated user to write ciphers (encrypted credentials) into arbitrary organizations via the POST /ciphers/import-organization endpoint by submitting an empty collections array, bypassing authorization checks. This missing authorization vulnerability (CWE-862) affects all authenticated users regardless of organization membership, enabling them to inject malicious credentials or pivot across organizations. Publicly available exploit code exists, and the vendor has released patched version 2026.4.1.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Primary rating from Vendor (VulnCheck) · only source for this CVE.
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via POST /ciphers/import-organization by submitting an empty collections array, which causes the server-side permission check to be skipped.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Account takeover in self-hosted Bitwarden Server before 2026.6.0 lets a low-privileged organization member steal any oth
Provider service users in Bitwarden Server Cloud can hijack arbitrary organizations via unauthorized API endpoint access
Authentication bypass in Bitwarden Server versions prior to 2026.4.1 allows authenticated users with SCIM management pri
Authentication bypass in self-hosted Bitwarden Server versions 2025.6.0 through 2026.5.0 backed by Microsoft SQL Server
Bitwarden through 2023.2.1 offers password auto-fill when the second-level domain matches, e.g., a password stored for a
Privilege escalation in self-hosted Bitwarden Server before 2026.5.0 lets an authenticated organization member holding a
Bitwarden Windows desktop application versions prior to v2023.4.0 store biometric keys in Windows Credential Manager, ac
Audit log integrity across all Bitwarden Server organizations can be undermined by any authenticated user, who may injec
Broken access control in Bitwarden Server before 2026.5.0 exposes organization billing data to any authenticated user vi
Malicious code injection in Bitwarden CLI 2026.4.0 distributed via npm for 90 minutes on April 22, 2026, enables remote
Bitwarden Server 1.35.1 allows SSRF because it does not consider certain IPv6 addresses (ones beginning with fc, fd, fe,
The Bitwarden server through 1.32.0 has a potentially unwanted KDF. Rated high severity (CVSS 7.5), this vulnerability i
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