CVE-2026-27803

Name: CVE-2026-27803
Creator: NVD / NIST
Published: 2026-03-04T22:16:18.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.3/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2026-27803 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. 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 as long as they have access to the collection. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

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 as long as they have access to the collection. This issue has been patched in version 1.35.4.

Metrics

CVSS 3.1

8.3/10

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

EPSS Probability

0.29%

20.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dani-Garcia	Vaultwarden	< 1.35.4

References

https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27Vendor Advisory

Timeline

Published: Mar 4, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-27803?

How severe is CVE-2026-27803?

CVE-2026-27803 has a CVSS score of 8.3/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-27803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST