CVE-2026-101906
Published:September 28, 2026
Updated:October 08, 2026
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.
Affected Packages
https://github.com/axios/axios.git (GITHUB):
Affected version(s) >=v1.15.0 <v1.20.0Fix Suggestion:
Update to version v1.20.0https://github.com/axios/axios.git (GITHUB):
Affected version(s) >=v0.31.0 <v0.34.0Fix Suggestion:
Update to version v0.34.0axios (NPM):
Affected version(s) >=1.15.0 <1.20.0Fix Suggestion:
Update to version 1.20.0axios (NPM):
Affected version(s) >=0.31.0 <0.34.0Fix Suggestion:
Update to version 0.34.0Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
EPSS
Base Score:
0.40