Executive Summary

CVE-2026-7022 is a critical security vulnerability in the AgentRuntime engine of the npm package @smythos/sre (versions up to 0.0.15). It arises from improper handling of HTTP debug headers, specifically the X-DEBUG-INJ header, which allows an unauthenticated attacker to inject and execute arbitrary internal agent components.

The vulnerability exists because the AgentRuntime class extracts debug headers from incoming HTTP requests without authentication or validation. If the X-DEBUG-INJ header is present, the raw HTTP request body is assigned directly to a privileged internal state variable, which the runtime then prioritizes over the legitimate authenticated component graph.

This flaw enables attackers to bypass all upstream authentication and authorization checks by forging context properties, effectively allowing unauthorized execution of privileged downstream nodes within the agent runtime.

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Impact Analysis

This vulnerability can have severe impacts including complete bypass of authentication and authorization mechanisms within the AgentRuntime environment.

An unauthenticated external attacker can hijack the agent execution flow, leading to arbitrary execution of internal components.

• Potential Remote Code Execution (RCE)
• Sensitive data extraction
• Arbitrary state corruption or manipulation

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Detection Guidance

This vulnerability can be detected by monitoring HTTP requests for the presence of the special debug headers `X-DEBUG-RUN` and `X-DEBUG-INJ` being sent to the vulnerable SmythOS sre service. Specifically, detection involves identifying unauthorized or suspicious POST requests containing the `X-DEBUG-INJ` header with potentially malicious JSON payloads that attempt to inject or manipulate the internal agent component graph.

A practical detection approach is to capture and analyze HTTP traffic to the affected service and look for requests with these headers. For example, using command-line tools like curl or tcpdump can help identify such requests.

• Use tcpdump or tshark to capture HTTP traffic and filter for the `X-DEBUG-INJ` header: `tcpdump -A -s 0 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | grep -i 'X-DEBUG-INJ'`
• Use curl to test if the service responds to requests with the `X-DEBUG-INJ` header: `curl -v -X POST http://target-service/ -H 'X-DEBUG-INJ: test' -d '{"malicious":"payload"}'`

Detection can also involve reviewing server logs for unexpected or unauthorized use of these debug headers, as legitimate traffic should not normally include them.

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Mitigation Strategies

Immediate mitigation steps include blocking or filtering HTTP requests that contain the `X-DEBUG-RUN` and `X-DEBUG-INJ` headers at the network perimeter or web application firewall (WAF) level to prevent exploitation attempts.

If possible, disable or restrict the use of debug headers in the SmythOS sre service configuration or code to ensure that these headers are not processed without proper authentication and validation.

Monitor and audit logs for any suspicious activity involving these headers and unauthorized component execution attempts.

Since no patched versions are specified, consider isolating or temporarily disabling the vulnerable component until a fix or update is available from the vendor.

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Compliance Impact

This vulnerability allows complete bypass of authentication and authorization mechanisms, enabling unauthenticated attackers to execute arbitrary internal components, potentially leading to remote code execution, data leakage, or state manipulation.

Such unauthorized access and potential data exposure could result in non-compliance with common standards and regulations like GDPR and HIPAA, which require strict controls over access to sensitive data and systems.

Specifically, the risk of sensitive data extraction or unauthorized system control violates principles of data confidentiality, integrity, and access control mandated by these regulations.

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