VDB
CVE-2026-42040
CVE-2026-42040
PUBLISHED
CVSS 3.700000047683716 LOW
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.
EPSS 0.06% · 19.2th percentile
Risk Scores
CVSS v3.1
3.700000047683716
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS Score
0.06%
19.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| axios | axios | >= 1.0.0, < 1.15.1, * |
| Salesforce | flow |
Timeline
- Apr 24, 2026 CVE Published
- Apr 25, 2026 EPSS Score
- May 6, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score