CVE-2026-42073
Medium · 6.5CVSS
6.5
EPSS
0.3%
Published
Jun 2, 2026
CISA due date
—
The record
OpenClaude is an open-source coding-agent command line interface for cloud and local model providers. Prior to version 0.5.1, the OpenClaude MCP authentication flow starts a temporary local HTTP server to handle OAuth callbacks. To prevent CSRF attacks, the server validates a state parameter against an internally stored value. However, due to a logic flaw in the order of conditionals, an attacker can completely bypass this check and force the server to shut down — without knowing the state value at all. This issue has been patched in version 0.5.1.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | @gitlawb/openclaude | 0 | 0.5.1 |
Related vulnerabilities
- GHSA-c73c-x77g-854r OpenClaude MCP OAuth Callback: State Check Bypass via error Param Leads to DoS Same vulnerability
- GHSA-m6rx-7pvw-2f73 OpenClaude: Sandbox Bypass via Early-Exit Logic Flaw Allows Path Traversal Also affects @gitlawb/openclaude
- CVE-2026-35570 OpenClaude is an open-source coding-agent command line interface for cloud and local… Also affects @gitlawb/openclaude
- CVE-2026-96388 Cross-Site Request Forgery (CSRF) vulnerability in Drupal Tawk.to - Live chat application… CWE-352
- CVE-2026-96374 Cross-Site Request Forgery (CSRF) vulnerability in Drupal Project Browser allows Cross… CWE-352
- CVE-2026-114719 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a CSRF validation… CWE-352
- CVE-2026-114662 Obot before 0.26.0 contains an authentication bypass vulnerability in the CLI login flow… CWE-352
- CVE-2026-111883 Locust through 2.46.7 contains a cross-site request forgery vulnerability that allows… CWE-352