Vaultwarden
CVE-2026-27802
HIGH
GHSA-r32r-j5jq-3w4m
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
Vaultwarden versions before 1.35.4 contain a privilege escalation vulnerability that allows authenticated Manager-level users to modify permissions on collections they should not have access to. An attacker with Manager role can exploit this during bulk permission updates to gain unauthorized access to sensitive collections. A patch is available in version 1.35.4 and should be applied immediately.
Technical ContextAI
Classified as CWE-269 (Improper Privilege Management). Affects Vaultwarden. 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.
RemediationAI
Fixed in version 1.35.4.. Restrict network access to the affected service where possible.
More in Vaultwarden
View allTwo-factor authentication bypass in Vaultwarden 1.34.3 and earlier allows authenticated attackers to circumvent 2FA prot
Cross-organization authorization bypass in Vaultwarden (the Rust-based, self-hosted Bitwarden-compatible server) prior t
Vaultwarden versions prior to 1.35.4 fail to properly enforce collection management permissions, allowing authenticated
Session hijacking via a broken SSO/OAuth authorization flow affects Vaultwarden (the Rust-based Bitwarden-compatible ser
Improper authorization in Vaultwarden (self-hosted Bitwarden-compatible server) before 1.35.5 lets an authenticated user
Authentication bypass (account takeover) in Vaultwarden before 1.36.0 allows an attacker who controls a federated identi
vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Rated high sev
Brute-force protection bypass in Vaultwarden (the Rust Bitwarden-compatible server) before 1.35.4 lets unauthenticated r
Vaultwarden's SSO discovery endpoint exposed real organization SSO metadata - including organizationIdentifier values -
Insufficient session expiration in Vaultwarden prior to 1.35.5 allows an attacker holding a previously obtained refresh
Vaultwarden versions prior to 1.35.3 allow authenticated organization members to bypass collection-level access controls
Server-side request forgery (SSRF) in Vaultwarden's icon fetching endpoint allows blind internal network and port discov
Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
View allVendor StatusVendor
Share
External POC / Exploit Code
Leaving vuln.today