CVE-2026-42043: axios SSRF — Exploit & Fix

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range (other than 127.0.0.1) to completely bypass the NO_PROXY protection. This vulnerability is due to an incomplete for CVE-2025-62718, This vulnerability is fixed in 1.15.1 and 0.31.1.

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CVSS v3.1 Score

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0006

Probability of exploitation

0.17%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-183 CWE-183

CWE-441 CWE-441

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
axios	axios	< 0.31.1
axios	axios	1.0.0 — 1.15.1

References

Advisories & Patches

https://github.com/axios/axios/security/advisories/GHSA-pmwg-cvhr-8vh7 https://github.com/axios/axios/security/advisories/GHSA-pmwg-cvhr-8vh7

Exploits

https://github.com/axios/axios/security/advisories/GHSA-pmwg-cvhr-8vh7 https://github.com/axios/axios/security/advisories/GHSA-pmwg-cvhr-8vh7

Frequently Asked Questions

What is CVE-2026-42043? +

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, an attacker who can influence the target URL of an Axios request can use any address in the 127.0.0.0/8 range (other than 127.0.0.1) to completely bypass the NO_PROXY protection. This vulnerability is due to an incomplete for CVE-2025-62718, This vulnerability is fixed in 1.15.1 and 0.31.1. It has a CVSS v3.1 base score of 7.2 (HIGH).

How severe is CVE-2026-42043? +

CVE-2026-42043 has a CVSS v3.1 score of 7.2 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0006, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-42043? +

CVE-2026-42043 affects products from axios, specifically: axios. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-42043? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-42043