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Vulnerability · Published Jun 11, 2026 · Assigned by GitHub_M

CVE-2026-44494Axios: Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`

High 8.7

In plain English

A high-severity prototype pollution in axios from axios. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.7High
Exploit odds (30 days)1.1%top 35.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.16.0, the Axios library is vulnerable to a Prototype Pollution "Gadget" attack that allows any Object.prototype pollution in the application's dependency tree to be escalated into a full Man-in-the-Middle (MITM) attack — intercepting, reading, and modifying all HTTP traffic including authentication credentials. The HTTP adapter at lib/adapters/http.js:670 reads config.proxy via standard property access, which traverses the prototype chain. Because proxy is not present in Axios defaults, the merged config object has no own proxy property, making it trivially injectable via prototype pollution. Once injected, setProxy() routes all HTTP requests through the attacker's proxy server. This vulnerability is fixed in 1.16.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12node-axiosno fix listedDEBIAN-CVE-2026-44494
Debian:13node-axiosno fix listedDEBIAN-CVE-2026-44494
Debian:14node-axios1.16.0-1DEBIAN-CVE-2026-44494
Ubuntu:25.10node-axiosno fix listedUBUNTU-CVE-2026-44494
Ubuntu:26.10node-axiosno fix listedUBUNTU-CVE-2026-44494
npmaxios1.16.0GHSA-35jp-ww65-95wh

Affected products (as reported)

VendorProductVersions
axios axios >= 1.0.0, < 1.16.0

Weakness: CWE-441, CWE-1321, CWE-915 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

References