CVE-2026-15976

CRITICAL CVSS 3.1: 9.8 EPSS 0.60%
Updated Aug 04, 2026
Lmsys
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions before 0.5.15
Type CWE-502 (Deserialization of Untrusted Data), CWE-502: Deserialization of Untrusted Data
Vendor Lmsys
Public PoC No

SGLang contains a RCE vulnerability when attempting to load model weights from a HuggingFace repository, specifically within the /update_weights_from_disk, where torch.load(..., weights_only=False) fallback enables pickle deserialization of .bin files.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Lmsys Sglang
cpe:2.3:a:lmsys:sglang:*:*:*:*:*:*:*:*
— <= 0.5.15