CVE-2026-34430: ByteDance DeerFlow versions prior to commit 92c7a20 contain a sandbox escape vulnerability in bash tool handli

Q: How do I fix CVE-2026-34430?

deerflow: upgrade to 2026-03-29. Exact commands for each OS are on this page.

Q: Is CVE-2026-34430 being exploited?

CVE-2026-34430 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34430 affect?

CVE-2026-34430 affects deerflow. Severity is high (CVSS 8.8). 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

Routine

HIGH 8.8UPGRADE

CVE-2026-34430 is a high-severity flaw (CVSS 8.8) affecting deerflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-184
Published	2026-04-01
Last modified	2026-10-26

Publisher (CNA): VulnCheck · Vendor: deerflow

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 14:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

deerflow deerflow UPGRADE

Affected: < 2026-03-29

Fixed in: 2026-03-29

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy deerflow || rpm -q deerflow || deerflow --version

2. UPGRADE to 2026-03-29 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade deerflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade deerflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34430?

deerflow: upgrade to 2026-03-29. Exact commands for each OS are on this page.

Is CVE-2026-34430 being exploited?

CVE-2026-34430 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34430 affect?

CVE-2026-34430 affects deerflow. Severity is high (CVSS 8.8). 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

How urgent is CVE-2026-34430?

Priority 39/100. High severity

Related CVEs

CVE-2026-40518 HIGH 7.1 DOWNGRADE ByteDance DeerFlow before commit 2176b2b contains a path traversal and arbitrary file write vulnerability in b

References

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