Uncontrolled Recursion in axios - #VU136907
Published: July 6, 2026
Vulnerability identifier: #VU136907
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 formDataToJSON when processing attacker-controlled FormData field names during FormData-to-JSON conversion. A remote attacker can supply a crafted FormData field name with deeply nested bracket segments to cause a denial of service.
The vulnerable request-transform path is reached when FormData is sent with an application/json content type, and direct use of formToJSON() throws synchronously.
Remediation
Install security update from vendor's website.