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.
Affected products
axios: axios
References2
- github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw ExploitMitigationVendor Advisory
- github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw ExploitMitigationVendor Advisory
Metrics
- CVSS 3.1
-
3.7
LOW
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 12 · as of 13 November 2026
- CWE
- CWE-116CWE-626
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