VULNERABILITY INTELLIGENCE

CVE-2026-34430

CVSS score8.8 HIGH

EPSS probability0.41%

CISA KEVNot currently listed

Published2026-04-01

Last modified2026-10-26

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Weakness classification

disclosure@vulncheck.com: CWE-184
nvd@nist.gov: NVD-CWE-noinfo

Primary references

disclosure@vulncheck.com — Patch
disclosure@vulncheck.com — Issue Tracking, Patch, Vendor Advisory
disclosure@vulncheck.com — Third Party Advisory, VDB Entry