{"cve":"CVE-2026-42044","nvd":{"published":"2026-04-24T18:16:31.613","modified":"2026-09-10T13:20:05.490","status":"Modified","description":"Axios is a promise based HTTP client for the browser and Node.js. From 1.0.0 to before 1.15.2, he 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 surgical, invisible modification of all JSON API responses — including privilege escalation, balance manipulation, and authorization bypass. The default transformResponse function at lib/defaults/index.js:124 calls JSON.parse(data, this.parseReviver), where this is the merged config object. Because parseReviver is not present in Axios defaults, not validated by assertOptions, and not subject to any constraints, a polluted Object.prototype.parseReviver function is called for every key-value pair in every JSON response, allowing the attacker to selectively modify individual values while leaving the rest of the response intact. This vulnerability is fixed in 1.15.2.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-915","CWE-1321"],"references":["https://github.com/axios/axios/security/advisories/GHSA-3w6x-2g7m-8v23","https://access.redhat.com/errata/RHSA-2026:16532","https://access.redhat.com/errata/RHSA-2026:16534","https://access.redhat.com/errata/RHSA-2026:16535","https://access.redhat.com/errata/RHSA-2026:16542"],"products":["axios:axios"],"source":"nvd","synced_at":"2026-10-19T22:33:09.003606135+00:00"},"epss":{"cve":"CVE-2026-42044","score":0.00618,"percentile":0.49617,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-3w6x-2g7m-8v23","url":"https://osv.dev/vulnerability/GHSA-3w6x-2g7m-8v23","summary":"Axios: Invisible JSON Response Tampering via Prototype Pollution Gadget in `parseReviver`","modified":"2026-09-10T03:50:45.398396828Z","packages":[{"ecosystem":"npm","name":"axios","purl":"pkg:npm/axios","ranges":[">=1.0.0 <1.15.2"],"fixed":["1.15.2"]}]}],"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."]}