Axios, a well-known front bank, was poisoned! CVE-2026-25639 High-risk loopholes that could cause the breakdown of the Node.js server

In February 2026, JavaScript was confronted with a major security crisis!The well-known HTTP client library Axios was found to have a high-risk security gap CVE-2026-25639This loophole allows remote attackers to trigger the denial of services (DoS) attack by sending a single malicious request, resulting in the sudden collapse of the Node.js server. This loophole affects all Axios versions to 1.13.4 and CVSS ratings up to 7.5 (high risk)I don't know. Check and upgrade immediately if you are front-end or Node.js developer!

Overview of gaps

Fields	Details
CVE ID	CVE-2026-25639
Extent	High risk (CVSS 7.5)
Affected packages	axios (npm)
Affected version	<= 1.13.4
Impact	Deny service (server crash)
Attack vector	Network (remote)
Fix Version	1.13.5

It's a good idea.

The loophole exists in Axios MergeConfig function, this function consolidates different configuration objects. When Function Processing Contains proto When the object is configured as a key, the application crashes.

Attack flow

• Axios Default Run Through Configuration Properties to Merge them
• The attacker includes __proto__ Malicious JSON Object
• Axios tried to find a merge policy, but unexpectedly got Object.prototype
• Code tries to call the prototype as a function
• Because Object.prototype It's an object, not a function. Throw it. TypeError
• Application crashes instantaneously

Example of attack

The attacker simply sent the payload to break down the server:

{"__proto__": {"x": 1}}

It's a simple way to attack.Low attack complexityRatings, but very harmful.

The attack scene.

This loophole is specific to the following applications:

• AcceptUser control inputApplication (e.g. JSON body)
• Use JSON.parse() Parsing Input
• Import a parsed object into the Axios configuration (e. g. axios.get(url, userConfig)I'm not sure.

The application of these conditions is at risk of being attacked.A malicious request will allow the entire service. LineIt affects all users.

Distinction from prototype pollution

What needs attention is this loophole.Different from the traditional prototype pollution loophole.I don't know. In the traditional prototype contamination, the attackers influence other objects by modifying the object prototype, and in this loophole,The application crashed before the properties were contaminated.I don't know.

This collapse mechanism makes the attack more direct and lethal —Without a complex utilization chain, it's over.I don't know.

Rehabilitation programme

Upgrade Now

Axios, official. Version 1.13.5 Other Organiser __proto__ key to prevent type errors.

Use npm to upgrade:

npm update axios

Use yarn to upgrade:

yarn upgrade axios

Check current version:

npm list axios

Authentication fixes

Upgrade to ensure that the axios version of the package.json is:

"axios": ">=1.13.5"

• Scope of impact

Axios is one of the most popular HTTP client banks in JavaScript ecosystems, and it is the most popular HTTP client bank in the world.Over 50 million downloads per week.I don't know. This loophole has wide-ranging implications:

• Frontend: Use Axios Vue, React, Angular application
• Node.js BackendService-end application using Axios
• Microservice architectureOther Organiser
• Enterprise applications: A large number of enterprise systems rely on Axios

How?

1. Examination of dependent versions

# 检查项目中的 axios 版本
npm list axios

# 或查看 package.json
cat package.json | grep axios

2. Use of security scanning tools

# 使用 npm audit
npm audit

# 使用 Snyk
snyk test

Safety advice

• Upgrade Now: All projects using axios < = 1.13.4 are immediately upgraded to 1.13.5
• Audit reliance: check all project dependencies to ensure that old versions are not indirectly introduced
• Input Authentication: Strict validation of user input to avoid direct entry into the configuration object
• Security alert.: enhanced server surveillance and timely detection of abnormal breakdowns
• Security testRegular security tests to detect potential gaps

Summary

CVE-2026-25639 is one of the Axios libraryHigh-risk denial of service gapsAnd the attackers can make the Node.js server collapse in an instant by simply malicious JSON objects. This loophole has a wide-ranging impact and is highly harmful.

As developers, we must remain vigilant.• Timely updating of dependency, validation of user input, enhanced security testing. Safety, a seemingly simple configuration combined function, can also be a lethal entry point.

If you're still using axios < = 1.13.4,Please upgrade immediately to 1.13.5.Protect your applications and users!

It's nothing to worry about.