Sglang
CVE-2026-3989
HIGH
GHSA-hvwj-8w5g-28rg
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from Vendor (cert) · only source for this CVE.
CVSS VectorVendor: cert
Lifecycle Timeline
3DescriptionCVE.org
SGLangs replay_request_dump.py contains an insecure pickle.load() without validation and proper deserialization. An attacker can take advantage of this by providing a malicious .pkl file, which will execute the attackers code on the device running the script.
AnalysisAI
High severity vulnerability in SGLang. SGLangs replay_request_dump.py contains an insecure pickle.load() without validation and proper deserialization. An attacker can take advantage of this by providing a malicious .pkl file, which will execute the attackers code on the device running the script.
Technical ContextAI
Vulnerability Type: Deserialization of Untrusted Data (CWE-502) CVSS 3.1: 7.8/10.0 — Attack Vector: Local | Complexity: Low | Privileges Required: None | User Interaction: Required Source: https://github.com/sgl-project/sglang The vulnerability involves unsafe deserialization of untrusted input, which allows arbitrary code execution when an attacker supplies crafted serialized objects.
RemediationAI
Security advisories:
- https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities
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Remote code execution in SGLang (versions ≤ v0.5.15) allows attackers to achieve arbitrary code execution through the op
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
Leaving vuln.today