CVE-2026-44492 axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
Attackers can bypass NO_PROXY restrictions using IPv4-mapped IPv6 addresses to access internal services via a proxy, potentially leading to SSRF.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44492?
CVE-2026-44492 is a high-severity server-side request forgery vulnerability in axios, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Axios is a promise based HTTP client for the browser and Node.js. Prior to 0.32.0 and 1.16.0, Axios does not normalise IPv4-mapped IPv6 addresses. When NO_PROXY lists an IPv4 address such as 127.0.0.1 or 169.254.169.254, a request URL using the IPv4-mapped IPv6 form (::ffff:7f00:1, ::ffff:a9fe:a9fe) still routes through the configured proxy. Node.js resolves these addresses to the underlying IPv4 host, so the request reaches the internal service via the proxy rather than being blocked. This vulnerability is fixed in 0.32.0 and 1.16.0.
Which versions are affected by CVE-2026-44492?
4 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | All versions | 0.32.0 |
axios npm | All versions | 0.32.0 |
axios npm | From 1.15.0 | 1.16.0 |
axios npm | From 1.15.0 | 1.16.0 |
Products include Axios Axios.
How do I fix CVE-2026-44492?
Upgrade axios to a fixed version for your release line: 0.32.0 or 1.16.0.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-44492 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44492 exists.
Other vulnerabilities in axios
- CVE-2026-44494 Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
- CVE-2026-67320 axios before 0.33.0 Prototype Pollution via Node HTTP adapter
- CVE-2026-44487 Axios: Proxy-Authorization Credential Leak to Origin Server Across HTTP-to-HTTPS Redirect in Axios Node.js HTTP Adapter
- CVE-2025-27152 Possible SSRF and Credential Leakage via Absolute URL in axios Requests
- CVE-2026-44486 Axios: Proxy-Authorization header leaks to redirect target when proxy is re-evaluated to direct connection
Sources
Also known as CLEANSTART-2026-CX76306, CLSA-2026-1793101250, DEBIAN-CVE-2026-44492, ECHO-5ca0-ec34-e518, GHSA-pjwm-pj3p-43mv, MINI-2435-qg94-mhrx and 26 more.