CVE-2026-41372Network attack vector

Browser-state disclosure via trailing-dot localhost normalization bypass

Published Apr 27, 2026 · Updated Apr 27, 2026

SSRF in OpenClaw before 2026.4.2 allows remote attackers to expose localhost browser state through hostile CDP discovery responses. The remote-CDP URL normalizer compares localhost without first removing trailing dots, so localhost. survives the loopback check and redirects the follow-up connection to the OpenClaw host. A non-loopback CDP profile must trust an attacker-controlled discovery service, and the resulting browser-control connection carries authentication.

CVSS severity6.9
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in OpenClaw before 2026.4.2 allows remote attackers to expose localhost browser state through hostile CDP discovery responses. The remote-CDP URL normalizer compares localhost without first removing trailing dots, so localhost. survives the loopback check and redirects the follow-up connection to the OpenClaw host. A non-loopback CDP profile must trust an attacker-controlled discovery service, and the resulting browser-control connection carries authentication.

The record

CVE
CVE-2026-41372
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
OpenClaw Foundation
Product
OpenClaw
Classifications
CWE-639
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClaw Foundation · OpenClawversion=0 <2026.4.2

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
5.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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