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Permalink CVE-2026-47164
7.7 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): Low (L)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): Low (L)
created 1 month, 2 weeks ago Activity log
  • Created suggestion 1 month, 2 weeks ago
Vaultwarden: SSO Email Auto-Link Can Bind an Existing Local Account to an Attacker-Controlled IdP Identity

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's SSO login flow checked the IdP email_verified claim only for new-user creation and not when SSO_SIGNUPS_MATCH_EMAIL=true linked an IdP identity to an existing local account, allowing an attacker-controlled IdP identity asserting a victim email address to bind to and authenticate as that account. This issue is fixed in version 1.36.0.

Affected products

vaultwarden
  • ==< 1.36.0

Matching in nixpkgs

pkgs.vaultwarden

Unofficial Bitwarden compatible server written in Rust

  • nixos-unstable -
  • nixos-26.05 -

pkgs.vaultwarden-mysql

Unofficial Bitwarden compatible server written in Rust

  • nixos-unstable -
  • nixos-26.05 -

pkgs.vaultwarden-sqlite

Unofficial Bitwarden compatible server written in Rust

  • nixos-unstable -
  • nixos-26.05 -

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