Description
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into outgoing requests. The vulnerability exploits duck-type checking of the data payload, where if Object.prototype is polluted with getHeaders, append, pipe, on, once, and Symbol.toStringTag, Axios misidentifies any plain object payload as a FormData instance and calls the attacker-controlled getHeaders() function, merging the returned headers into the outgoing request. The vulnerable code resides exclusively in lib/adapters/http.js. The prototype pollution source does not need to originate from Axios itself — any prototype pollution primitive in any dependency in the application's dependency tree is sufficient to trigger this gadget. This vulnerability is fixed in 1.15.1 and 0.31.1.
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Remediation
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References
History
Fri, 24 Apr 2026 19:15:00 +0000
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Fri, 24 Apr 2026 18:00:00 +0000
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| Description | Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, a prototype pollution gadget exists in the Axios HTTP adapter (lib/adapters/http.js) that allows an attacker to inject arbitrary HTTP headers into outgoing requests. The vulnerability exploits duck-type checking of the data payload, where if Object.prototype is polluted with getHeaders, append, pipe, on, once, and Symbol.toStringTag, Axios misidentifies any plain object payload as a FormData instance and calls the attacker-controlled getHeaders() function, merging the returned headers into the outgoing request. The vulnerable code resides exclusively in lib/adapters/http.js. The prototype pollution source does not need to originate from Axios itself — any prototype pollution primitive in any dependency in the application's dependency tree is sufficient to trigger this gadget. This vulnerability is fixed in 1.15.1 and 0.31.1. | |
| Title | Axios: Header Injection via Prototype Pollution | |
| Weaknesses | CWE-113 CWE-1321 |
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-04-24T18:08:04.827Z
Reserved: 2026-04-23T16:05:01.708Z
Link: CVE-2026-42035
Updated: 2026-04-24T18:08:00.490Z
Status : Received
Published: 2026-04-24T18:16:30.273
Modified: 2026-04-24T19:17:14.807
Link: CVE-2026-42035
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OpenCVE Enrichment
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