---
id: CVE-2026-93034
title: >-
  SGLang contains an arbitrary code execution vulnerability caused by the ZMQ
  message decoder unconditionally deserializing PickleWrapper payloads via
  pickle.loads() in _maybe_unwrap_pickle without type allowlisting or
  authentication; this…
summary: >-
  SGLang contains an arbitrary code execution vulnerability caused by the ZMQ
  message decoder unconditionally deserializing PickleWrapper payloads via
  pickle.loads() in _maybe_unwrap_pickle without type allowlisting or
  authentication; this…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: SGLang
product: SGLang
affected:
  - SGLang <= v0.5.20
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T21:18:03.583'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93034'
references:
  - url: 'https://github.com/sgl-project/sglang/tree/main'
    label: cret@cert.org
  - url: >-
      https://m00dy.sh/notes/disabling-pickle-did-not-remove-pickle?palette=mineral
    label: cret@cert.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-08T14:47:16.370Z'
---

## Overview

SGLang contains an arbitrary code execution vulnerability caused by the ZMQ message decoder unconditionally deserializing PickleWrapper payloads via pickle.loads() in _maybe_unwrap_pickle without type allowlisting or authentication; this vulnerability persists via the msgpack path even when SGLANG_USE_PICKLE_IPC is disabled, and becomes remotely exploitable if data-parallel attention is enabled with a non-loopback --dist-init-addr setting.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.