CVE-2026-31835

Name
CVE-2026-31835
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.5
security-advisories@github.com https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-x7g7-cgx5-jhx2

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:* vaultwarden >= None < 1.35.5

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
vaultwarden edge-community 1.35.4-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.35.3-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.35.2-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.35.1-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.34.3-r1 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.34.1-r1 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.34.1-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.33.2-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.33.1-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.33.0-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.32.7-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.32.6-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.32.5-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.32.0-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden edge-community 1.32.0 None possibly vulnerable
vaultwarden 3.23-community 1.35.4-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden 3.23-community 1.35.3-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden 3.23-community 1.35.2-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden 3.23-community 1.35.1-r0 Fabricio Silva <hi@fabricio.dev> possibly vulnerable
vaultwarden 3.23-community 1.34.3-r1 Fabricio Silva <hi@fabricio.dev> possibly vulnerable