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CVE-2026-34430— ByteDance DeerFlow LocalSandboxProvider Host Bash Escape

Quick assessment

Affected
Bytedance Inc. DeerFlow
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

DeerFlow是Bytedance开源的一个开源智能体编排框架，用于协调子代理与技能执行。 DeerFlow 92c7a20之前版本存在安全漏洞，该漏洞源于bash工具处理中存在沙箱逃逸，攻击者可通过利用目录更改和相对路径等shell功能绕过基于正则表达式的验证，在主机系统上执行任意命令，可能导致读取和修改沙箱边界外的文件并通过启用shell解释的子进程调用实现任意命令执行。

CVSS 8.8 · High EPSS 0.80% · P56

Affected Version Matrix 1

VendorProduct Version RangeStatus
Bytedance Inc. DeerFlow < 92c7a20cb74addc3038d2131da78f2e239ef542e affected
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I. Basic Information for CVE-2026-34430

Vulnerability Information
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Vulnerability Title
ByteDance DeerFlow LocalSandboxProvider Host Bash Escape
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
DeerFlow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DeerFlow是Bytedance开源的一个开源智能体编排框架，用于协调子代理与技能执行。 DeerFlow 92c7a20之前版本存在安全漏洞，该漏洞源于bash工具处理中存在沙箱逃逸，攻击者可通过利用目录更改和相对路径等shell功能绕过基于正则表达式的验证，在主机系统上执行任意命令，可能导致读取和修改沙箱边界外的文件并通过启用shell解释的子进程调用实现任意命令执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Bytedance Inc. DeerFlow 0 ~ 92c7a20cb74addc3038d2131da78f2e239ef542e -

II. Public POCs for CVE-2026-34430

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9036 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-34430

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Patches & Fixes for CVE-2026-34430 (1)

IV. Related Vulnerabilities

Same product: DeerFlow
Same vendor: Bytedance Inc.
Same weakness: CWE-184

V. Comments for CVE-2026-34430

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