CVE-2026-42439
Undergoing Analysis Undergoing Analysis - In Progress
Server-Side Request Forgery Bypass in OpenClaw

Publication date: 2026-05-05

Last updated on: 2026-05-07

Assigner: VulnCheck

Description
OpenClaw before 2026.4.10 contains a server-side request forgery policy bypass vulnerability in the browser tabs action select and close routes. Attackers can bypass configured browser SSRF policy protections by exploiting the /tabs/action endpoint to perform unauthorized tab navigation operations.
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Meta Information
Published
2026-05-05
Last Modified
2026-05-07
Generated
2026-06-16
AI Q&A
2026-05-05
EPSS Evaluated
2026-06-15
NVD
CVE-2026-42439
EUVD
EUVD-2026-27261
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw to 2026.4.10 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

CVE-2026-42439 is a server-side request forgery (SSRF) policy bypass vulnerability found in OpenClaw versions before 2026.4.10. It affects the browser tabs action select and close routes, specifically the /tabs/action endpoint. Attackers can exploit this vulnerability to bypass the configured SSRF policy protections, allowing them to perform unauthorized tab navigation operations that should normally be restricted.

This vulnerability is caused by insufficient validation or missing authorization checks on the affected routes, categorized under CWE-862 and CWE-918, which relate to missing authorization and improper validation leading to SSRF risks.

Mitigation Strategies

To mitigate the CVE-2026-42439 vulnerability, you should upgrade OpenClaw to version 2026.4.10 or later, as these versions contain the patch that fixes the SSRF policy bypass in the browser tabs action routes.

This upgrade will enforce the intended SSRF policy protections and prevent unauthorized tab navigation operations via the /tabs/action endpoint.

Compliance Impact

The provided information does not specify how the CVE-2026-42439 vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Impact Analysis

This vulnerability can allow attackers with some level of access (low privileges) to bypass SSRF protections and perform unauthorized navigation operations within browser tabs. This could lead to unauthorized access to internal resources or sensitive information that the SSRF policy was designed to protect.

The impact includes potential exposure of internal services, weakening of security boundaries, and possible information disclosure. Although the CVSS v3.1 score rates it as high severity (8.5), the CVSS v4.0 score is moderate (4.9), reflecting the complexity and conditions required for exploitation.

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