Is CVE-2026-42040 actively exploited?

No active exploitation of CVE-2026-42040 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42040 be exploited remotely?

Yes. CVE-2026-42040 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42040?

CVE-2026-42040 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-42040

LOW

CVE-2026-42040

CWE-116Published: April 24, 2026· Updated: Apr 27, 2026

3.7

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-42040 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.