PT-2026-24943 · Sglang+1 · Sglang

Christopher Cullen · Published 2026-03-12 · Updated 2026-03-13 · CVE-2026-3989

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SGLangs versions prior to the fix included in CVE-2026-3989

Description The replay request dump.py script within SGLangs contains an insecure pickle.load() function that lacks validation and proper deserialization. An attacker can exploit this by providing a malicious .pkl file, which will execute the attacker's code on the affected device. The vulnerable function is pickle.load(). The script processes the .pkl file without verifying its contents, allowing for arbitrary code execution.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-3989

GHSA-HVWJ-8W5G-28RG

Affected Products

Sglang

References · 11

• https://osv.dev/vulnerability/CVE-2026-3989 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hvwj-8w5g-28rg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3989 · Security Note
• https://github.com/sgl-project/sglang · Note
• https://github.com/sgl-project/sglang/pull/20904 · Note
• https://github.com/sgl-project/sglang/releases/tag/v0.5.10 · Note
• https://github.com/sgl-project/sglang/blob/main/scripts/playground/replay_request_dump.py · Note
• https://t.me/CVEtracker/47250 · Telegram Post
• https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities · Note
• https://twitter.com/CVEnew/status/2032410969008484832 · Twitter Post
• https://t.me/cveNotify/155252 · Telegram Post