What is CVE-2026-34430?

CVE-2026-34430 is a high-severity vulnerability in Bytedance Inc. Deerflow, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2026-04-01.

How severe is CVE-2026-34430?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Bytedance Inc. Deerflow

CVE-2026-34430

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 feature…

EPSS: 0.001 (29.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Bytedance Inc. Deerflow — versions 0
Deerflow

Weakness classification (CWE)

CWE-184 — Incomplete List of Disallowed Inputs

References

disclosure@vulncheck.com (issue-tracking, Patch, Issue Tracking, Vendor Advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (VDB Entry, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-34430?: CVE-2026-34430 is a high-severity vulnerability in Bytedance Inc. Deerflow, classified under Incomplete List of Disallowed Inputs. CVSS score: 8.8/10. Published 2026-04-01.
How severe is CVE-2026-34430?: High severity. CVSS v3 base score is 8.8 out of 10.