CVE-2026-3989: Lmsys Sglang

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Lmsys Sglang: before 0.5.10 (fixed in 0.5.10)

Published 2026-03-12. Last modified 2026-08-10.