Vulnerability · Published Apr 28, 2026 · Assigned by VulnCheck
CVE-2026-42421OpenClaw < 2026.4.8 - WebSocket Session Persistence via Shared Gateway Token Rotation
Medium 5.4
In plain English
A medium-severity security flaw in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 91.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
OpenClaw before 2026.4.8 contains a session management vulnerability where existing WebSocket sessions survive shared gateway token rotation. Attackers can maintain unauthorized access to WebSocket connections after token rotation by exploiting the failure to disconnect existing shared-token sessions.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | openclaw | 2026.4.8 | GHSA-5h3f-885m-v22w |
Affected products (as reported)
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-5h3f-885m-v22w) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.4.8 - WebSocket Session Persistence via Shared Gateway Token Rotation third-party-advisory