Vulnerability · Published May 11, 2026 · Assigned by VulnCheck

CVE-2026-45223Crabbox < 0.9.0 Authentication Bypass via Admin Claim Injection

High 8.8

In plain English

A high-severity authentication bypass by spoofing in crabbox from openclaw. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 67.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
openclaw	crabbox	0 – before 0.9.0

Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/openclaw/crabbox/releases/tag/v0.9.0 release-notes
https://github.com/openclaw/crabbox/pull/64 issue-tracking
https://github.com/openclaw/crabbox/commit/46079f6de7f10cf61bc47efebd0c143a41664898 patch
https://www.vulncheck.com/advisories/crabbox-authentication-bypass-via-admin-claim-injection third-party-advisory