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CVE PROGRAM SOURCE RECORD6.8 Medium

CVE-2026-42038

Axios: no_proxy bypass via IP alias allows SSRF

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instead of bypassing it. The shouldBypassProxy() function does pure string matching — it does not resolve IP aliases or loopback equivalents. This vulnerability is fixed in 1.15.1 and 0.31.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

axios axios

  • >= 1.0.0, < 1.15.1affected
  • < 0.31.1affected

References