OpenClaw SSRF exposes internal URLs (CVE-2026-34504)

Overview

A server-side request forgery (SSRF) vulnerability has been identified in OpenClaw versions prior to 2026.3.28. The flaw resides within the fal provider image-generation-provider.ts component. This vulnerability allows a malicious or compromised external service to force the application to make unauthorized requests to internal network resources.

Vulnerability Details

In simple terms, this flaw misconfigures how OpenClaw’s image generation pipeline fetches data. Normally, it should only download images from specified, trusted external sources. However, due to insufficient validation, a malicious actor controlling a “fal relay” server can trick OpenClaw into downloading data from internal URLs that should never be accessible from the outside. This includes metadata and responses from internal administrative or backend services.

Impact

The primary risk is information disclosure and network reconnaissance. Attackers can exploit this to:

• Map the internal network by probing for active services.
• Retrieve sensitive metadata from internal APIs or management consoles.
• Potentially access cloud metadata services (like AWS IMDS) if the OpenClaw instance is hosted in such an environment. With a CVSS score of 8.3 (HIGH), this is a significant risk as it requires no user interaction or special privileges and can be executed over the network with low attack complexity.

Remediation and Mitigation

The vendor has released a fix. The only complete remediation is to immediately upgrade OpenClaw to version 2026.3.28 or later. This update patches the image-generation-provider.ts component to properly validate and restrict fetched URLs. If an immediate upgrade is not possible, consider the following temporary mitigation strategies:

• Network Segmentation: Ensure the OpenClaw server is deployed in a demilitarized zone (DMZ) or a tightly controlled network segment with strict outbound firewall rules, limiting its ability to connect to internal services.
• Egress Filtering: Implement egress filtering at the network level to block the OpenClaw host from initiating connections to internal IP ranges (like 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, and the local loopback 127.0.0.0/8).
• Vendor Advisory: Monitor the official OpenClaw channels for any additional guidance.

Security Insight

This SSRF flaw highlights the persistent risk in modern applications that aggregate or process content from external, user-influenced sources. Similar to past incidents in other SaaS platforms, it underscores how a single misconfigured integration point can become a pivot into an organization’s internal network. It serves as a critical reminder to apply the principle of least privilege not just to user access, but also to the network permissions of application servers themselves. For more on how such vulnerabilities lead to incidents, see our breach reports.

Further Reading

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