Vulnerability Description
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instead of bypassing it. The shouldBypassProxy() function does pure string matching — it does not resolve IP aliases or loopback equivalents. This vulnerability is fixed in 1.15.1 and 0.31.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Axios | Axios | < 0.31.1 |
Related Weaknesses (CWE)
References
- https://github.com/axios/axios/security/advisories/GHSA-m7pr-hjqh-92cmExploitMitigationVendor Advisory
- https://github.com/axios/axios/security/advisories/GHSA-m7pr-hjqh-92cmExploitMitigationVendor Advisory
FAQ
What is CVE-2026-42038?
CVE-2026-42038 is a vulnerability with a CVSS score of 6.8 (MEDIUM). Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests ...
How severe is CVE-2026-42038?
CVE-2026-42038 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42038?
Check the references section above for vendor advisories and patch information. Affected products include: Axios Axios.