CVE-2026-44492

A flaw was found in Axios, a promise-based HTTP client. This vulnerability occurs because Axios does not properly normalize IPv4-mapped IPv6 addresses. When a NO_PROXY setting is configured to block direct access to specific IPv4 addresses, an attacker can bypass this restriction by using the IPv4-mapped IPv6 form of the address in a request URL. This allows the request to be routed through the proxy, potentially exposing internal services or sensitive information that should otherwise be inaccessible.

This is an Important flaw in Axios, a JavaScript HTTP client library, that allows for a proxy bypass. When a NO_PROXY environment variable is configured to prevent direct connections to specific IPv4 addresses, an attacker can craft a request URL using the IPv4-mapped IPv6 address format. This bypasses the intended NO_PROXY exclusion, routing the request through the configured proxy and potentially exposing internal services or sensitive information, such as cloud instance metadata credentials.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.