What is CVE-2026-27803?

CVE-2026-27803 is a high-severity vulnerability in Dani-garcia Vaultwarden, classified under Improper Privilege Management. CVSS score: 8.3/10. Published 2026-03-04.

How severe is CVE-2026-27803?

High severity. CVSS v3 base score is 8.3 out of 10.

Auth bypass in Dani-garcia Vaultwarden

CVE-2026-27803

Vaultwarden is an unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs. Prior to version 1.35.4, when a Manager has manage=false for a given collection, they can still perform several management operations…

Vulnerability class: Privilege Escalation

EPSS: 0.001 (19.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

Affected products

Dani-garcia Vaultwarden — versions < 1.35.4

Weakness classification (CWE)

References

https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-27803?: CVE-2026-27803 is a high-severity vulnerability in Dani-garcia Vaultwarden, classified under Improper Privilege Management. CVSS score: 8.3/10. Published 2026-03-04.
How severe is CVE-2026-27803?: High severity. CVSS v3 base score is 8.3 out of 10.