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Low severity3.7NVD Advisory· Published Apr 24, 2026· Updated Apr 27, 2026

CVE-2026-42040

CVE-2026-42040

Description

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
axiosnpm
>= 1.0.0, < 1.15.11.15.1
axiosnpm
< 0.31.10.31.1

Affected products

50

Patches

Vulnerability mechanics

References

3

News mentions

0

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