CVE-2026-42040 (GCVE-0-2026-42040)
Vulnerability from cvelistv5
Published
2026-04-24 17:40
Modified
2026-04-27 13:48
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-116 - Improper Encoding or Escaping of Output
  • CWE-626 - Null Byte Interaction Error (Poison Null Byte)
Summary
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, the encode() function in lib/helpers/AxiosURLSearchParams.js contains a character mapping (charMap) at line 21 that reverses the safe percent-encoding of null bytes. After encodeURIComponent('\x00') correctly produces the safe sequence %00, the charMap entry '%00': '\x00' converts it back to a raw null byte. Primary impact is limited because the standard axios request flow is not affected. This vulnerability is fixed in 1.15.1 and 0.31.1.
References
Impacted products
Vendor Product Version
axios axios Version: >= 1.0.0, < 1.15.1
Version: < 0.31.1
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