What is CVE-2026-43912?

CVE-2026-43912 is a high-severity vulnerability in Dani-garcia Vaultwarden, classified under Improper Authorization. CVSS score: 8.7/10. Published 2026-05-11.

How severe is CVE-2026-43912?

High severity. CVSS v3 base score is 8.7 out of 10.

Auth bypass in Dani-garcia Vaultwarden

CVE-2026-43912

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden does not enforce that a groups_users.users_organizations_uuid entry belongs to the same organization as groups.groups_uuid, or a collections_groups…

EPSS: 0.000 (13.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.

Affected products

Dani-garcia Vaultwarden — versions < 1.35.5

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-43912?: CVE-2026-43912 is a high-severity vulnerability in Dani-garcia Vaultwarden, classified under Improper Authorization. CVSS score: 8.7/10. Published 2026-05-11.
How severe is CVE-2026-43912?: High severity. CVSS v3 base score is 8.7 out of 10.