Risk Letters

Exploited vulnerability

CVE-2026-25639

TLP:CLEAR

axios axios Improper Check for Unusual or Exceptional Conditions

Axios is a promise based HTTP client for the browser and Node.js. Prior to versions 0.30.3 and 1.13.5, the mergeConfig function in axios crashes with a TypeError when processing configuration objects containing __proto__ as an own property. An attacker can trigger this by providing a malicious configuration object created via JSON.parse(), causing complete denial of service. This vulnerability is fixed in versions 0.30.3 and 1.13.5.

Facts

  • Vendor: Axios
  • Product: Axios
  • EPSS (probability of exploitation within 30 days): 2.8 %
  • First known exploitation: 28 October 2026
  • First seen by Risk Letters: 28 October 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD