SB2025110448 - Multiple vulnerabilities in vLLM

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2025-48956)

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.

2) Deserialization of Untrusted Data (CVE-ID: CVE-2025-9141)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data within the Qwen3 Coder tool parser. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://github.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944
• https://github.com/vllm-project/vllm/pull/23267
• https://github.com/vllm-project/vllm/security/advisories/GHSA-rxc4-3w6r-4v47
• https://github.com/vllm-project/vllm/security/advisories/GHSA-79j6-g2m3-jgfw