Privilege Escalation in Vaultwarden Unofficial Bitwarden Server
CVE-2026-27802

8.3HIGH

Key Information:

Vendor

Dani-garcia

Status
Vaultwarden
Vendor
CVE Published:
4 March 2026

What is CVE-2026-27802?

Vaultwarden, an unofficial Bitwarden-compatible server, is susceptible to a privilege escalation vulnerability that allows Managers to perform bulk permission updates to unauthorized collections. This security flaw could potentially grant unauthorized users access to sensitive data. The vulnerability has been resolved in version 1.35.4, emphasizing the necessity for users to update their systems promptly to safeguard their information.

Affected Version(s)

vaultwarden < 1.35.4

References

https://github.com/dani-garcia/vaultwarden/security/advis...
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CVSS V3.1

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.