Crabbox before 0.9.0 contains an authentication bypass vulnerability in the coordinator user-token verification path where the verifyUserToken() function fails to reject payloads containing an admin claim, allowing attackers to escalate privileges. An attacker with access to the shared non-admin token can craft a user-token payload with admin: true, sign it using HMAC-SHA256, and present it to admin-only coordinator routes to gain full coordinator admin access including lease visibility, pool state management, and forced release operations.
History

Mon, 11 May 2026 18:45:00 +0000

Type Values Removed Values Added
Description Crabbox before 0.9.0 contains an authentication bypass vulnerability in the coordinator user-token verification path where the verifyUserToken() function fails to reject payloads containing an admin claim, allowing attackers to escalate privileges. An attacker with access to the shared non-admin token can craft a user-token payload with admin: true, sign it using HMAC-SHA256, and present it to admin-only coordinator routes to gain full coordinator admin access including lease visibility, pool state management, and forced release operations.
Title Crabbox < 0.9.0 Authentication Bypass via Admin Claim Injection
Weaknesses CWE-290
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-11T18:35:52.217Z

Reserved: 2026-05-11T14:14:49.611Z

Link: CVE-2026-45223

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-11T19:16:28.103

Modified: 2026-05-11T20:25:47.350

Link: CVE-2026-45223

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T19:30:06Z