---
id: CVE-2026-34430
title: ByteDance DeerFlow LocalSandboxProvider Host Bash Escape
summary: "ByteDance DeerFlow versions prior to commit 92c7a20 contain\_a sandbox escape vulnerability in bash tool handling that allows attackers to execute arbitrary commands on the host system by bypassing regex-based validation using shell featu…"
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-184
vendor: Bytedance Inc.
product: DeerFlow
affected:
  - DeerFlow < 92c7a20cb74addc3038d2131da78f2e239ef542e
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-04-01T14:53:10.913158Z'
published: '2026-04-01'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:02:10.068Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-34430'
references:
  - url: 'https://github.com/bytedance/deer-flow/pull/1547'
  - url: >-
      https://github.com/bytedance/deer-flow/commit/92c7a20cb74addc3038d2131da78f2e239ef542e
  - url: >-
      https://www.vulncheck.com/advisories/bytedance-deerflow-localsandboxprovider-host-bash-escape
tags:
  - cve.org
epss: 0.00407
epssPercentile: 0.35228
ingestedAt: '2026-11-08T14:51:22.453Z'
---

## Overview

ByteDance DeerFlow versions prior to commit 92c7a20 contain a sandbox escape vulnerability in bash tool handling that allows attackers to execute arbitrary commands on the host system by bypassing regex-based validation using shell features such as directory changes and relative paths. Attackers can exploit the incomplete shell semantics modeling to read and modify files outside the sandbox boundary and achieve arbitrary command execution through subprocess invocation with shell interpretation enabled.

## Affected

- `DeerFlow < 92c7a20cb74addc3038d2131da78f2e239ef542e`

## Remediation

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