Uncontrolled Recursion in axios - #VU136919
Published: July 6, 2026
Vulnerability identifier: #VU136919
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: axios
Affected software:
axios
axios
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in lib/helpers/toFormData.js when serializing an object with a top-level key ending in {} and a deeply nested object value. A remote attacker can supply crafted object keys and nested values to trigger a stack overflow and cause a denial of service.
The issue affects form and parameter serialization paths that delegate to toFormData, and the thrown error is a raw RangeError rather than the intended AxiosError depth-limit signal.
Remediation
Install security update from vendor's website.