#VU118093 Resource exhaustion in vLLM - CVE-2025-48956
Published: November 4, 2025
Vulnerability identifier: #VU118093
Vulnerability risk: Medium
CVSSv4.0: 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: CVE-2025-48956
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
vLLM
vLLM
Software vendor:
vLLM
vLLM
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when parsing HTTP header values. A remote attacker can send a specially crafted HTTP request with an overly large header value (e.g. for X-Forwarded-For header) to trigger resource exhaustion and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.