CVE-2026-42264 Axios: Prototype pollution read-side gadgets in HTTP adapter allow credential injection and request hijacking
Prototype pollution in Axios allows attackers to inject credentials or hijack HTTP requests by polluting Object.prototype, affecting Node.js applications using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-42264?
CVE-2026-42264 is a high-severity unsafe deserialization vulnerability in axios, published on 8 May 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. 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.
Which versions are affected by CVE-2026-42264?
2 open source packages ship an affected version, including axios. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
axios npm | From 1.0.0 | 1.15.2 |
axios npm | From 1.0.0 | 1.15.2 |
Products include Axios Axios.
How do I fix CVE-2026-42264?
Upgrade axios to 1.15.2 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-42264 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42264 exists.
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-IO99141, CLEANSTART-2026-MV85464, DEBIAN-CVE-2026-42264, ECHO-eb29-0852-fa5c, GHSA-q8qp-cvcw-x6jj, MINI-26vr-qrmc-57xc and 22 more.