--- id: CVE-2026-44494 title: Axios is a promise based HTTP client for the browser and Node.js summary: >- 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 depen… severity: high cvss: 8.7 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N' cwe: - CWE-441 - CWE-1321 - CWE-915 vendor: axios product: axios affected: - 'axios >= 1.0.0, < 1.16.0' patched: - axios 1.16.0 published: '2026-06-11' updated: '2026-09-11' sourceUpdated: '2026-09-11T13:18:07.983' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44494' references: - url: 'https://github.com/axios/axios/security/advisories/GHSA-35jp-ww65-95wh' label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:20889' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:20938' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:27044' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28964' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - 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url: 'https://access.redhat.com/errata/RHSA-2026:26234' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c tags: - nvd - cve.org - exploit-available exploitAvailable: true ssvc: exploitation: poc automatable: 'no' technicalImpact: total timestamp: '2026-06-11T00:00:00+00:00' epss: 0.00932 epssPercentile: 0.59053 ingestedAt: '2026-07-07T12:52:59.636Z' --- ## Overview 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 - `axios >= 1.0.0, < 1.16.0` ## Remediation Upgrade past the affected range: - `axios 1.16.0`