GHSA-xhjh-pmcv-23jw · Severity: low · Ecosystem: npm — Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
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.
Conclusion & alert: CVE-2026-42040 is rated Exploit Available (50/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.20%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.20% | +0.15% |
| 2 | 2026-05-13 | 0.03% | 0.06% | +0.03% |
| 3 | 2026-04-25 | — | 0.03% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 3.7 | 3.1 | LOW |
|
2.2 | 1.4 | [email protected] |
GHSA-xhjh-pmcv-23jw · Severity: low · Ecosystem: npm — Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-42040 not yet assigned priority: Debian including 1 source packages (node-axios), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. | https://security-tracker.debian.org/tracker/CVE-2026-42040 |
suse
|
medium | CVE-2026-42040 severity moderate: SUSE including 27 source package names (corepack22, corepack24, …), 118 product×package rows across 20 product lines (SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS, … (20 product lines)): Known Not Affected 118. | https://www.suse.com/security/cve/CVE-2026-42040/ |
ubuntu
|
medium | CVE-2026-42040 medium priority: Ubuntu including 1 source packages (node-axios), 6 status rows across 6 suites (focal, jammy, noble, questing, resolute, upstream): needs-triage 5, released 1. | https://ubuntu.com/security/CVE-2026-42040 |
| URL | Tags |
|---|---|
| https://github.com/axios/axios/security/advisories/GHSA-xhjh-pmcv-23jw | Exploit Mitigation Vendor Advisory |