How severe is CVE-2026-34430?

CVE-2026-34430 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34430 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34430?

CVE-2026-34430 affects Deerflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34430?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34430 have an EU (EUVD) identifier?

Yes. CVE-2026-34430 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17903.

When was CVE-2026-34430 published?

CVE-2026-34430 was published on 2026-04-01 and last updated on 2026-07-14.

CVE-2026-34430

CVE-2026-34430 is a high-severity vulnerability in Deerflow with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-184.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.6
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17903
Weakness: CWE-184
Affected product: Deerflow
Published: 2026-04-01
Last modified: 2026-07-14

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-34430?: CVE-2026-34430 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34430 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34430?: CVE-2026-34430 affects Deerflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34430?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34430 have an EU (EUVD) identifier?: Yes. CVE-2026-34430 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17903.
When was CVE-2026-34430 published?: CVE-2026-34430 was published on 2026-04-01 and last updated on 2026-07-14.

References

Affected products (1)

cpe:2.3:a:deerflow:deerflow:*:*:*:*:*:*:*:*

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