CVE-2026-27802

Vaultwarden: Privilege Escalation via Bulk Permission Update to Unauthorized Collections by Manager

HIGH
8.3
CVSS Score
Published: March 4, 2026 at 09:34 PM UTC
Updated: June 17, 2026 at 10:27 AM UTC
1 product affected across 1 vendorVaultwarden

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Severity
HIGH8.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, there is a privilege escalation vulnerability via bulk permission update to unauthorized collections by Manager. This issue has been patched in version 1.35.4.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.35.4
Affected range stops below 1.35.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.3HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-269CWE-863

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