Vaultwarden: Collection Management Operations Allowed Without `manage` Verification for Manager Role

published 2026-03-04 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-9503 , GHSA-h4hq-rgvh-wh27

cvss: 8.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

crates.io vaultwarden 1.35.4
dani-garcia vaultwarden 1.35.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-27803 updated 2026-06-28 cvss 8.3

vaultwarden: Vaultwarden: Unauthorized collection management operations due to improper access control

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 8 mo ago (2026-03-05)

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
GitHub	3.1	8.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
crates.io	vaultwarden	<1.35.4	1.35.4

Affected products

dani-garcia vaultwarden

Classification

Weakness

CWE-269 Improper Privilege Management
CWE-863 Incorrect Authorization
CWE-285 Improper Authorization

References

github.com /dani-garcia/vaultwarden/security/advisories/GHSA-h4hq-rgvh-wh27
web, vendor-advisory
github.com /dani-garcia/vaultwarden
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary