CVE-2026-33420 MEDIUM

CVE-2026-33420: Vaultwarden missing authorization check allows Manager-role users to enumerate all collections

Vendor Dani-Garcia
Product vaultwarden
Weakness CWE-862 · Missing authorization
Published May 5, 2026
Last update May 6, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Vaultwarden is a Bitwarden-compatible server written in Rust. In version 1.35.4 and earlier, the get_org_collections_details endpoint (GET /api/organizations/{org_id}/collections/details) is missing the has_full_access() authorization check that exists on the sibling get_org_collections endpoint. This allows any Manager-role user with accessAll=False and no collection assignments to retrieve the names, UUIDs, user-to-collection mappings, and group-to-collection mappings for all collections in the organization. This issue has been fixed in version 1.35.5.

Key dates

02Disclosure timeline

May 5, 2026 CVE published
May 6, 2026 Record updated