CVE-2026-34430 HIGH

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

Vendor Bytedance Inc.
Product DeerFlow
Weakness CWE-184
Published April 1, 2026
Last update May 12, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 1, 2026 CVE published
May 12, 2026 Record updated