{"cve":"CVE-2026-101909","nvd":{"published":"2026-09-28T18:17:19.680","modified":"2026-10-01T15:17:24.670","status":"Undergoing Analysis","description":"Axios is a promise-based HTTP client for the browser and Node.js. From 0.28.0 until 0.34.0 and 1.15.1 until 1.20.0, ToFormData processes inherited serialization options and visitor properties supplied through prototype pollution. A separate same-process prototype-pollution flaw supplies inherited dots, indexes, metaTokens, maxDepth, visitor, or Blob values before object serialization. The inherited options alter toFormData field naming and data interpretation, maxDepth can force request failure, Blob changes value handling, and a polluted visitor can execute when an attacker already has the stronger ability to inject a function. Serialized field naming and data interpretation can change, maxDepth can cause request failure, Blob can alter value handling, and a polluted visitor can execute under the stronger function-injection primitive. This issue is fixed in versions 0.34.0 and 1.20.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","score":8.3},"cvss_v3":null,"cwes":["CWE-1321"],"references":["https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","https://github.com/axios/axios/commit/d29be181f85f6fe93397a07b1f69606d9622637b","https://github.com/axios/axios/pull/11141","https://github.com/axios/axios/releases/tag/v0.34.0","https://github.com/axios/axios/releases/tag/v1.20.0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-101909","score":0.00497,"percentile":0.42339,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-x97p-jq2g-jp4f","url":"https://osv.dev/vulnerability/GHSA-x97p-jq2g-jp4f","summary":"Axios: Prototype Pollution Gadget in axios toFormData Options","modified":"2026-09-30T15:15:04.052506341Z","packages":[{"ecosystem":"npm","name":"axios","purl":"pkg:npm/axios","ranges":[">=0.28.0 <0.34.0"],"fixed":["0.34.0"]},{"ecosystem":"npm","name":"axios","purl":"pkg:npm/axios","ranges":[">=1.15.1 <1.20.0"],"fixed":["1.20.0"]}]}],"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."]}