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Vulnerabilities CVE-2026-44494

CVE-2026-44494

High
Open
TLP:CLEAR

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

NVD CVE.org
Critical Infrastructure

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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.

Details

CVSS Score
8.7
EPSS Score
1.04%

60.9th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Confidence
90%
Published
Jun 11, 2026
Last Modified
Aug 12, 2026
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