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Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M

CVE-2026-42039Axios: unbounded recursion in toFormData causes DoS via deeply nested request data

High 7.5

In plain English

A high-severity resource allocation without limits in axios from axios. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 44.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, toFormData recursively walks nested objects with no depth limit, so a deeply nested value passed as request data crashes the Node.js process with a RangeError. This vulnerability is fixed in 1.15.1 and 0.31.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12node-axiosno fix listedDEBIAN-CVE-2026-42039
Debian:13node-axiosno fix listedDEBIAN-CVE-2026-42039
Debian:14node-axios1.15.2-1DEBIAN-CVE-2026-42039
Ubuntu:25.10node-axiosno fix listedUBUNTU-CVE-2026-42039
Ubuntu:26.10node-axiosno fix listedUBUNTU-CVE-2026-42039
npmaxios0.31.1GHSA-62hf-57xw-28j9
npmaxios1.15.1GHSA-62hf-57xw-28j9

Affected products (as reported)

VendorProductVersions
axios axios >= 1.0.0, < 1.15.1< 0.31.1

Weakness: CWE-674, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References