CVE-2026-42421 — MEDIUM (5.4)

Q: How severe is CVE-2026-42421?

CVE-2026-42421 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-42421?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.

Vulnerability 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.

CVSS Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Openclaw	Openclaw	< 2026.4.8

Related Weaknesses (CWE)

CWE-613

References

https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e8143Patch
https://github.com/openclaw/openclaw/security/advisories/GHSA-5h3f-885m-v22wVendor Advisory
https://www.vulncheck.com/advisories/openclaw-websocket-session-persistence-via-Third Party Advisory

FAQ

What is CVE-2026-42421?

CVE-2026-42421 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 co...

How severe is CVE-2026-42421?

CVE-2026-42421 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42421?

Check the references section above for vendor advisories and patch information. Affected products include: Openclaw Openclaw.