CVE-2026-41372

MEDIUM 5.8

OpenClaw < 2026.4.2 - Loopback Protection Bypass via Trailing-Dot Localhost in CDP Discovery

CVSS Score

5.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-639
Vendor	openclaw
Product	openclaw
Published	Apr 27, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

OpenClaw / OpenClaw

0 < 2026.4.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-fh32-73r9-rgh5 github.com: https://github.com/openclaw/openclaw/commit/9c22d636697336a6b22b0ae24798d8b8325d7828 vulncheck.com: https://www.vulncheck.com/advisories/openclaw-loopback-protection-bypass-via-trailing-dot-localhost-in-cdp-discovery

Credits

🔍 smaeljaish771 KeenSecurityLab