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CVE-2026-44492 is an SSRF-related proxy-exclusion bypass in Axios versions before 0.32.0 on the legacy branch and before 1.16.0 on the 1.x branch. Axios fails to canonicalize IPv4-mapped IPv6 destinations before comparing them with IPv4-based NO_PROXY exclusions. The shouldBypassProxy function introduced in version 1.15.0 incompletely addressed CVE-2025-62718; earlier proxy-from-env handling also has the normalization gap. A crafted request URL can therefore route through the configured proxy despite an exclusion for the equivalent IPv4 destination. Node.js resolves the mapped address to its underlying IPv4 host, potentially allowing access to internal services or cloud metadata endpoints.
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Axios fails to normalize IPv4-mapped IPv6 addresses when evaluating NO_PROXY, allowing requests to internal IPv4 services to traverse a configured proxy despite matching IPv4 exclusions. The advisory assigns a CVSS v3 base score of 8.6, with high confidentiality impact. Fixed versions are 0.32.0 and 1.16.0.
Proxy bypass in Axios due to failure to normalize IPv4-mapped IPv6 addresses.
Axios proxy-bypass vulnerability caused by failure to normalize IPv4-mapped IPv6 addresses.
A proxy bypass vulnerability in Axios caused by failure to normalize IPv4-mapped IPv6 addresses, allowing requests intended to be excluded by NO_PROXY to still traverse the configured proxy and reach internal services.
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Cross-references every affected SKU, including bundled OEM variants.
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