CVE-2026-31835

Katalog CVE

CVSS 5.4 · Medium EPSS 0,19%

Kerentanan Insufficient Verification of Data Authenticity pada dani-garcia vaultwarden. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

Vaultwarden is a Bitwarden-compatible server written in Rust. In versions 1.35.4 and earlier, the WebAuthn authentication flow in `validate_webauthn_login()` updates persistent credential metadata (1backup_eligible1 and 1backup_state flags1) based on unverified `authenticatorData` before signature validation is performed. An attacker who knows a user's password but cannot produce a valid WebAuthn signature can permanently modify the stored backup flags for that user's credential. If signature verification fails, the database update is not rolled back. This can result in a persistent denial of service of WebAuthn two-factor authentication for affected credentials. This issue has been fixed in version 1.35.5.

Rincian

Terbit di NVD

5 Mei 2026

Terakhir diubah

25 Juli 2026

Status NVD

Analyzed

CVSS 3.1

5.4 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-345: Insufficient Verification of Data Authenticity

EPSS (30 hari)

0,19% peluang dieksploitasi; lebih tinggi dari 8,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-x7g7-cgx5-jhx2 exploit · advisory vendor
• https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.5 product · release notes