Resource exhaustion in starlette - #VU132130
Published: February 14, 2023 / Updated: May 22, 2026
Vulnerability identifier: #VU132130
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in MultipartParser when processing multipart form data with too many fields or files. A remote attacker can send a specially crafted multipart request to cause a denial of service.
Exploitation requires python-multipart to be installed and the application to call request.form().
Affected software
starlette
Remediation
Install security update from vendor's website.
starlette - update to 0.25.0