---
id: CVE-2026-101900
title: Axios is a promise-based HTTP client for the browser and Node.js
summary: >-
  Axios is a promise-based HTTP client for the browser and Node.js. From 1.12.0
  until 1.20.0, ResolveConfig reads inherited Symbol.toStringTag, append, and
  getHeaders properties while resolving FormData headers. A separate
  same-process pro…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N'
cwe:
  - CWE-74
  - CWE-693
  - CWE-1321
vendor: axios
product: axios
affected:
  - 'axios >= 1.12.0, < 1.20.0'
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T18:17:18.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101900'
references:
  - url: >-
      https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a
    label: security-advisories@github.com
  - url: 'https://github.com/axios/axios/pull/11141'
    label: security-advisories@github.com
  - url: 'https://github.com/axios/axios/releases/tag/v1.20.0'
    label: security-advisories@github.com
  - url: 'https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2'
    label: security-advisories@github.com
  - url: 'https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-28T17:48:51.957700Z'
cvssSource: cna
ingestedAt: '2026-09-28T18:17:54.305Z'
---

## Overview

Axios is a promise-based HTTP client for the browser and Node.js. From 1.12.0 until 1.20.0, ResolveConfig reads inherited Symbol.toStringTag, append, and getHeaders properties while resolving FormData headers. A separate same-process prototype-pollution flaw supplies an array or non-plain class instance whose inherited properties make it appear FormData-like; plain objects are blocked. The inherited getHeaders function can return attacker-controlled headers that resolveConfig merges into a fetch adapter request. Attacker-controlled headers can alter authorization, cache, metadata-service, or application-specific request behavior. This issue is fixed in version 1.20.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.