A critical Server-Side Request Forgery vulnerability in the Axios HTTP client allows unauthenticated attackers to bypass proxy protections and access internal network resources.

This is a Server-Side Request Forgery (SSRF) flaw resulting from an incomplete fix for a previous vulnerability. An unauthenticated attacker capable of influencing the target URL can bypass NO_PROXY settings by targeting addresses in the 127.0.0.0/8 range, excluding 127.0.0.1.

The ability to bypass proxy restrictions allows attackers to perform requests against internal services that are otherwise protected from external access. This can lead to unauthorized data exfiltration or the manipulation of internal systems, resulting in significant security breaches. With a CVSS score of 7.2, this vulnerability represents a high-severity risk that could facilitate lateral movement within a corporate network.

Immediate Action: Update the Axios package to version 1.15.1 or 0.31.1 immediately to incorporate the necessary security patches.

Proactive Monitoring: Monitor outgoing traffic from servers utilizing Axios for requests destined for internal IP ranges, specifically looking for traffic originating from the 127.0.0.0/8 subnet.

Compensating Controls: Implement strict network-level egress filtering to prevent servers from initiating requests to sensitive internal infrastructure, effectively limiting the impact of a potential SSRF exploit.

Public Exploit Available: No (exploit_available: unknown)

Given the prevalence of Axios in modern Node.js and browser-based applications, this vulnerability poses a significant risk to application integrity. Organizations must prioritize updating their dependencies to the fixed versions to ensure that internal network boundaries remain enforced and protected from external SSRF attacks.