---
id: CVE-2026-3989
aliases:
  - GHSA-hvwj-8w5g-28rg
  - PYSEC-2026-3063
title: >-
  SGLangs `replay_request_dump.py` contains an insecure pickle.load() without
  validation and proper deserialization
summary: >-
  SGLangs `replay_request_dump.py` contains an insecure pickle.load() without
  validation and proper deserialization
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: sglang
product: sglang
ecosystem: pip
affected:
  - sglang < 0.5.10
patched:
  - sglang 0.5.10
published: '2026-03-12'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hvwj-8w5g-28rg'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3989'
  - url: 'https://github.com/sgl-project/sglang/pull/20904'
  - url: 'https://github.com/sgl-project/sglang'
  - url: >-
      https://github.com/sgl-project/sglang/blob/main/scripts/playground/replay_request_dump.py
  - url: 'https://github.com/sgl-project/sglang/releases/tag/v0.5.10'
  - url: >-
      https://orca.security/resources/blog/sglang-llm-framework-rce-vulnerabilities
tags:
  - osv
  - pip
epss: 0.00468
epssPercentile: 0.39708
ingestedAt: '2026-07-13T18:57:59.507Z'
---

## Overview

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 packages

- `sglang < 0.5.10`

## Remediation

Upgrade to a patched release:

- `sglang 0.5.10`