CVE•Published 2026-05-11•Modified 2026-05-13•0 articles on news•5 live references•NVD data

CVE-2026-43914Dani-garcia · Vaultwarden

Vulnerability data via NVD (ingested)

CVSS v3.1

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS percentile

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Weaknesses (CWE)

CWE-307Improper Restriction of Excessive Authentication Attempts

Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.4, there is a security vulnerability in Vaultwarden that allows bypassing the login brute-force protection if email 2fa is enabled. If email 2fa is enabled, the unprotected 2fa-function send_email_login (email.rs, api endpoint /api/two-factor/send-email-login) also acts as an oracle determining whether a username-password combination is correct. An attacker can abuse that endpoint to brute-force passwords without rate-limiting. This works even for users who don't have email 2fa configured. This vulnerability is fixed in 1.35.4.

Timeline

Published 2026-05-11

Modified 2026-05-13

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-43914

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Dani-garcia Vaultwarden"

All exposed Dani-garcia Vaultwarden instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Vaultwarden"

HTTP body or banner mentions "Vaultwarden" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-43914