CVE-2026-42038
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Axios
PublishedApr 24, 2026
First seenApr 24, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- axios axios0.31.1, 1.15.1 or later
- axios1.15.1, 0.31.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| axios axios | v < 0.31.1, 1.0.0 ≤ v < 1.15.1 | 0.31.1, 1.15.1 |
| axiosnpm | 1.0.0 ≤ v < 1.15.1, v < 0.31.1 | 1.15.1, 0.31.1 |
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