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CVE-2026-41372: OpenClaw 2026.4.2 and Earlier: Trailing-Dot Hostname Bypass

CVE-2026-41372 · published 6 months ago

Summary

OpenClaw's discovery feature allows attackers to bypass security protections by crafting fake responses that redirect users to localhost endpoints on their own devices. This can lead to unauthorized access to browser state and control. To fix this, update to version 2026.4.2 or later.

Original advisory text

OpenClaw before 2026.4.2 fails to normalize trailing-dot localhost hosts in remote CDP discovery responses, allowing bypass of loopback protections. Attackers can craft hostile discovery responses returning localhost. to retarget authenticated browser control toward localhost endpoints and expose browser state.

References

Fix within

Internet-facing 14 days

Internal 60 days

Not known to be exploited
Can be exploited automatically
Gives an attacker partial control

Severity

6.9 Medium

Exploitation

<1% chance of attack within 30 days

Type

CWE-639Authorization Bypass Through User-Controlled Key

Timeline

Published28 Apr 2026

Updated4 Nov 2026

First seen28 Apr 2026

Sources

CVE-2026-41372 · NVD

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