CVE-2026-44492
Description
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.
Statement
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.
Mitigation
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.6 | N/A | 8.6 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism
Frequently Asked Questions
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