{"api_version":"1","generated_at":"2026-06-12T18:28:03+00:00","cve":"CVE-2026-44490","urls":{"html":"https://cve.report/CVE-2026-44490","api":"https://cve.report/api/cve/CVE-2026-44490.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-44490","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-44490"},"summary":{"title":"Axios: DoS & Header Injection via Prototype Pollution Read-Side Gadgets in axios merge functions","description":"Axios is a promise based HTTP client for the browser and Node.js. Prior to 0.32.0 and 1.16.0, axios exposes two read-side prototype-pollution gadgets. When Object.prototype is polluted by an upstream dependency in the same process (e.g. lodash _.merge / CVE-2018-16487), axios silently picks up the polluted values. (1) lib/utils.js line 406 builds merge()'s accumulator as result = {}, so result[targetKey] (line 414) walks Object.prototype and the polluted bucket's own keys are copied into the merged headers and ride out on the wire. (2) lib/core/mergeConfig.js line 26 builds the hasOwnProperty descriptor as a plain-object literal. Object.defineProperty reads descriptor.get/descriptor.set via the prototype chain, so a polluted Object.prototype.get or Object.prototype.set makes the call throw TypeError synchronously on every axios request. 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