CVE-2026-42040

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Source
https://cve.org/CVERecord?id=CVE-2026-42040
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42040.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42040
Aliases
Downstream
Related
Published
2026-04-24T17:40:31.125Z
Modified
2026-07-08T08:12:35.167611911Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Axios: Null Byte Injection via Reverse-Encoding in AxiosURLSearchParams
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42040.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-116",
        "CWE-626"
    ]
}
References

Affected packages

Git / github.com/axios/axios

Affected ranges

Type
GIT
Repo
https://github.com/axios/axios
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a589dc525af12e0fabef7d6e5be028ad433eee31
Introduced
484aa4fe6addccbd32206a31eb3d2d000843066e
Fixed
ac42446be51300fe214ba3c6e40cc95f34fd6871
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.31.1"
        },
        {
            "introduced": "1.0.0"
        },
        {
            "fixed": "1.15.1"
        }
    ]
}

Affected versions

0.*
0.19.1
0.21.3
1.*
1.2.0-alpha.1
1.2.2
v0.*
v0.1.0
v0.10.0
v0.11.0
v0.11.1
v0.12.0
v0.13.0
v0.13.1
v0.14.0
v0.15.0
v0.15.1
v0.15.2
v0.15.3
v0.16.0
v0.16.1
v0.16.2
v0.17.0
v0.17.1
v0.18.0
v0.19.0
v0.19.0-beta.1
v0.19.1
v0.19.2
v0.2.0
v0.2.1
v0.2.2
v0.20.0
v0.20.0-0
v0.21.0
v0.21.2
v0.23.0
v0.24.0
v0.25.0
v0.26.0
v0.26.1
v0.27.0
v0.27.1
v0.27.2
v0.28.0
v0.28.1
v0.29.0
v0.3.0
v0.3.1
v0.30.0
v0.30.1
v0.30.2
v0.30.3
v0.31.0
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.5.1
v0.5.2
v0.5.3
v0.5.4
v0.6.0
v0.7.0
v0.8.0
v0.8.1
v0.9.0
v0.9.1
v1.*
v1.0.0
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.10.0
v1.11.0
v1.12.0
v1.12.1
v1.12.2
v1.13.0
v1.13.1
v1.13.2
v1.13.3
v1.13.4
v1.13.5
v1.13.6
v1.14.0
v1.15.0
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.2.5
v1.2.6
v1.3.0
v1.3.1
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.4.0
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.6.4
v1.6.5
v1.6.6
v1.6.7
v1.6.8
v1.7.0
v1.7.0-beta.0
v1.7.0-beta.1
v1.7.0-beta.2
v1.7.1
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42040.json"