Executive Summary

CVE-2026-6981 is a Server-Side Request Forgery (SSRF) vulnerability found in AiraHub2. It occurs in the functions handling the connect_stream_endpoint and sync_agents endpoints, where attacker-controlled URL parameters (such as agent_url and hub_urls) are used directly in HTTP requests without proper validation or restrictions.

This allows an attacker to trick the server into making unauthorized HTTP requests to internal services or cloud metadata endpoints, potentially exposing sensitive information or enabling further attacks.

The vulnerability arises because the server does not enforce any network egress policies or URL validation, and no compensating controls are in place to block malicious payloads.

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Impact Analysis

This vulnerability can impact you by allowing attackers to access internal services and sensitive information that should not be exposed externally.

• Confidentiality risk: Attackers may gain access to internal or cloud metadata endpoints, exposing sensitive data.
• Integrity risk: Attackers might manipulate internal admin APIs or services by chaining SSRF attacks.
• Availability risk: Probing or abusing internal services could cause load or instability, affecting service availability.

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Detection Guidance

This vulnerability can be detected by monitoring and testing the vulnerable endpoints `/connect/stream` and `/admin/sync_agents` for Server-Side Request Forgery (SSRF) behavior. Specifically, sending crafted requests with parameters such as `agent_url` or JSON bodies containing `hub_urls` that point to internal or sensitive endpoints can reveal if the server makes unauthorized internal HTTP requests.

Example detection commands include:

• Send a POST request to `/admin/sync_agents` with JSON body: {"hub_urls":["http://127.0.0.1:2375"]} to check if the server attempts to access the Docker API endpoint.
• Send a POST request to `/connect/stream` with query parameters: agent_url=http://127.0.0.1:2375/events&name=poc-agent to test if the server streams from an internal URL.

These tests can be performed using tools like curl or HTTP clients to observe if the server makes outbound requests to internal services, indicating the presence of the SSRF vulnerability.

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Mitigation Strategies

Immediate mitigation steps include restricting access to the vulnerable endpoints and implementing strict validation and access controls.

• Restrict access to `/connect/stream` and `/admin/sync_agents` endpoints using network ACLs, authentication, authorization, and mutual TLS.
• Reject untrusted URLs or metacharacters and enforce strict allowlists for outbound requests to prevent arbitrary URL usage.
• Implement endpoint-level authentication and authorization before processing sensitive requests.
• Add regression tests covering all known proof-of-concept payloads to detect exploitation attempts.

Long-term fixes involve eliminating direct use of attacker-controlled URLs in outbound requests, using safe APIs without shell execution, and enforcing strict URL validation and network egress policies.

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Compliance Impact

CVE-2026-6981 is a Server-Side Request Forgery (SSRF) vulnerability that allows attackers to coerce the server into making unauthorized HTTP requests to internal services or cloud metadata endpoints, potentially exposing sensitive information.

Such exposure of sensitive internal services and data could lead to violations of data protection regulations like GDPR or HIPAA, which require strict controls over the confidentiality and integrity of personal and sensitive information.

Because the vulnerability can lead to unauthorized access and potential data leakage, affected organizations may face compliance risks if they do not implement proper mitigations such as input validation, access controls, and network egress restrictions.

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