Is CVE-2026-27803 actively exploited?

No active exploitation of CVE-2026-27803 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27803 be exploited remotely?

Yes. CVE-2026-27803 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27803?

CVE-2026-27803 has a CVSS score of 8.3 (HIGH).

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HIGH

CVE-2026-27803

CWE-269Published: March 4, 2026· Updated: Mar 6, 2026

8.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-27803 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.3.