High severity · published Mar 4, 2026
CVE-2026-27803
Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Manager Role
8.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
vaultwarden · dani-garcia
< 1.35.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27803
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27803
Vendor Advisory
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27
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