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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-05-05

Last Modified

2026-05-07

Generated

2026-07-06

AI Q&A

2026-05-05

EPSS Evaluated

2026-07-05

NVD

CVE-2026-42439

EUVD

EUVD-2026-27261

Affected Vendors & Products

Vendor	Product	Version / Range
openclaw	openclaw	to 2026.4.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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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