Executive Summary

CVE-2026-43527 is a Server-Side Request Forgery (SSRF) vulnerability in OpenClaw versions before 2026.4.14. The issue arises from an insecure default browser SSRF policy that allows navigation to private networks by default. This misconfiguration enables attackers to craft requests that the server executes, allowing them to access internal services or metadata endpoints within private networks that should normally be inaccessible.

The vulnerability is due to improper initialization of SSRF policy settings, specifically allowing private-network navigation without explicit permission. This flaw is related to weaknesses CWE-918 (SSRF) and CWE-1188 (insecure default initialization).

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Impact Analysis

This vulnerability can allow attackers to exploit the server to send unauthorized requests to internal network services or metadata endpoints that are normally protected from external access. As a result, attackers may gain access to sensitive internal resources, potentially leading to information disclosure or further attacks within the private network.

Because the SSRF policy incorrectly permits private-network navigation by default, attackers can bypass network segmentation and access internal services that should be restricted, increasing the risk of data exposure or unauthorized control over internal systems.

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Detection Guidance

This vulnerability involves Server-Side Request Forgery (SSRF) in OpenClaw's browser SSRF policy allowing navigation to private networks by default. Detection would involve monitoring or testing for unauthorized internal network requests initiated by the OpenClaw server or browser components.

Since the vulnerability allows crafted requests to internal services or metadata endpoints, you can attempt to detect it by sending controlled SSRF test requests through OpenClaw to internal IP addresses (e.g., 127.0.0.1 or private IP ranges like 192.168.x.x) and observing if these requests succeed.

Specific commands are not provided in the available resources, but general approaches include:

• Using network monitoring tools (e.g., tcpdump, Wireshark) to detect unexpected outbound requests from OpenClaw to internal IP addresses.
• Testing OpenClaw's browser-driven requests by attempting to access internal endpoints via crafted inputs or scripts.
• Reviewing OpenClaw logs for evidence of SSRF attempts or unusual navigation to private network addresses.

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Mitigation Strategies

The primary mitigation step is to upgrade OpenClaw to version 2026.4.14 or later, where the vulnerability has been fixed by enforcing a strict Server-Side Request Forgery (SSRF) policy that disables private-network navigation by default.

The fix includes restoring strict SSRF configuration, explicitly disallowing private-network access unless explicitly enabled, and allowing loopback Chrome DevTools Protocol (CDP) endpoints only under controlled conditions.

If upgrading immediately is not possible, review and modify your OpenClaw browser SSRF policy configuration to ensure that the setting `dangerouslyAllowPrivateNetwork` is set to false, enforcing strict SSRF policies and preventing unauthorized private network navigation.

• Upgrade OpenClaw to version 2026.4.14 or newer.
• Configure the browser SSRF policy to disable private network navigation by setting `dangerouslyAllowPrivateNetwork: false`.
• Verify that loopback CDP endpoints are properly allowed only under strict policy to maintain functionality without exposing private network access.
• Monitor and audit OpenClaw usage to detect any attempts to exploit SSRF.

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Compliance Impact

The vulnerability in OpenClaw prior to version 2026.4.14 allows unauthorized access to internal services or metadata endpoints through a misconfigured default browser SSRF policy that permits private-network navigation. This unauthorized access risk could lead to exposure of sensitive internal data.

Such exposure of internal or sensitive data could potentially violate compliance requirements under common standards and regulations like GDPR or HIPAA, which mandate strict controls over access to personal or protected information and require prevention of unauthorized data disclosure.

Therefore, until patched, this vulnerability may undermine an organization's ability to maintain compliance with these regulations by increasing the risk of data breaches or unauthorized internal data access.

Upgrading to OpenClaw version 2026.4.14 or later, which enforces strict SSRF policies by default and restricts private-network navigation, is necessary to mitigate this risk and support compliance efforts.

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