CVE-2025-10164 MEDIUM

CVE-2025-10164: lmsys sglang update_weights_from_tensor main deserialization

Vendor Lmsys
Product sglang
Weakness CWE-502 · Unsafe deserialization
Published September 9, 2025
Last update September 10, 2025

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security flaw has been discovered in lmsys sglang 0.4.6. Affected by this vulnerability is the function main of the file /update_weights_from_tensor. The manipulation of the argument serialized_named_tensors results in deserialization. The attack can be launched remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

Key dates

02Disclosure timeline

September 9, 2025 CVE published
September 10, 2025 Record updated