Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
Summary
Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-42040 node-axios
- Ubuntu UBUNTU-CVE-2026-42040 node-axios
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov