{"cve":"CVE-2026-44490","nvd":{"published":"2026-06-11T17:16:33.027","modified":"2026-06-17T10:50:43.067","status":"Analyzed","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. This vulnerability is fixed in 0.32.0 and 1.16.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","score":8.2},"cwes":["CWE-1321"],"references":["https://github.com/axios/axios/security/advisories/GHSA-898c-q2cr-xwhg","https://github.com/axios/axios/security/advisories/GHSA-898c-q2cr-xwhg"],"products":["axios:axios"],"source":"nvd","synced_at":"2026-10-19T22:38:48.522727527+00:00"},"epss":{"cve":"CVE-2026-44490","score":0.00332,"percentile":0.26477,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-898c-q2cr-xwhg","url":"https://osv.dev/vulnerability/GHSA-898c-q2cr-xwhg","summary":"axios has DoS & Header Injection via Prototype Pollution Read-Side Gadgets in axios merge functions","modified":"2026-09-10T03:51:04.811379218Z","packages":[{"ecosystem":"npm","name":"axios","purl":"pkg:npm/axios","ranges":[">=1.0.0 <1.16.0"],"fixed":["1.16.0"]},{"ecosystem":"npm","name":"axios","purl":"pkg:npm/axios","ranges":["<0.32.0"],"fixed":["0.32.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}