CVSS 3.1
3.7 lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NCVE-2026-42040
Low (3.7) in axios axios. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in axios 0.31.1, 1.15.1.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-116, CWE-626
- Published
- Modified
- Record from
- the NVD, synced
Affected
- axios:axios
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xhjh-pmcv-23jw | npm | axios | >=1.0.0 <1.15.1 | 1.15.1 |
| GHSA-xhjh-pmcv-23jw | npm | axios | <0.31.1 | 0.31.1 |