CVE-2026-40175 Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain
Attackers can exploit prototype pollution to inject headers, enabling Server-Side Request Forgery to exfiltrate cloud metadata from applications using Axios.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40175?
CVE-2026-40175 is a medium-severity server-side request forgery vulnerability in axios, published on 10 Apr 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. Versions prior to 1.15.0 and 0.3.1 are vulnerable to a specific gadget-style attack chain in which prototype pollution in a third-party dependency may be leveraged to inject unsanitized header values into outbound requests. This vulnerability is fixed in 1.15.0 and 0.3.1.
Which versions are affected by CVE-2026-40175?
4 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | All versions | 0.31.0 |
axios npm | All versions | 0.31.0 |
axios npm | From 1.0.0 | 1.15.0 |
axios npm | From 1.0.0 | 1.15.0 |
Products include Axios Axios.
How do I fix CVE-2026-40175?
Upgrade axios to a fixed version for your release line: 0.31.0 or 1.15.0.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-40175 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40175 exists.
Public exploit code: 4 proofs of concept on GitHub.
Other vulnerabilities in axios
- CVE-2026-44494 Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
- CVE-2026-44492 axios's shouldBypassProxy does not recognize IPv4-mapped IPv6 addresses, allowing NO_PROXY bypass (incomplete fix for CVE-2025-62718)
- 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
Sources
Also known as CLEANSTART-2026-JV08161, CLEANSTART-2026-QI58975, DEBIAN-CVE-2026-40175, ECHO-b49d-4738-7e8f, GHSA-fvcv-3m26-pcqx, MINI-4hcx-jv7c-2mmm and 20 more.