---
id: CVE-2026-101906
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 1.15.0
  until 1.20.0, Axios shouldBypassProxy applies a quadratic trailing-dot regular
  expression to redirect hostnames. HTTP_PROXY or HTTPS_PROXY is configured,
  NO_PR…
severity: high
cvss: 8.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-400
  - CWE-1333
vendor: axios
product: axios
affected:
  - 'axios >= 1.15.0, < 1.20.0'
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T18:17:19.100'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101906'
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-mghh-pgcx-3jjj'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-28T18:17:54.307Z'
---

## Overview

Axios is a promise-based HTTP client for the browser and Node.js. From 1.15.0 until 1.20.0, Axios shouldBypassProxy applies a quadratic trailing-dot regular expression to redirect hostnames. HTTP_PROXY or HTTPS_PROXY is configured, NO_PROXY or no_proxy is non-empty, redirects are followed, and a crafted redirect Location contains many dots followed by a non-dot character. Hostname.replace(/.+$/, '') backtracks quadratically while processing the crafted redirect hostname. Synchronous regular-expression processing can block the Node.js event loop and cause denial of service. This issue is fixed in version 1.20.0.

## Remediation

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