Vulnerability in Deepseek-Ai Deepseek-Harness
CVE-2026-108789
A vulnerability was identified in deepseek-ai deepseek-harness up to 0.1.1-rc.2. This affects the function agent of the component dsh-workflow-worker-thread. The manipulation leads to enforcement of behavioral workflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Deepseek-Ai Deepseek-Harness — versions 0.1.1-rc.0, 0.1.1-rc.1, 0.1.1-rc.2
Weakness classification (CWE)
References
- vuldb.com/vuln/416568 (technical-description, vdb-entry)
- vuldb.com/vuln/416568/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-108789 (third-party-advisory)
- vuldb.com/submit/959699 (third-party-advisory)
- github.com/deepseek-ai/deepseek-harness/discussions/243 (related)
- mcniyfj5bw9b.feishu.cn/docx/M5H6d9AbioNftYxwk9CchJgGnHc (exploit)
- github.com/deepseek-ai/deepseek-harness/ (product)
Frequently asked questions
- What is CVE-2026-108789?
- CVE-2026-108789 is a medium-severity vulnerability in Deepseek-Ai Deepseek-Harness, classified under CWE-840. CVSS score: 5.5/10. Published 2026-10-12.
- How severe is CVE-2026-108789?
- Medium severity. CVSS v3 base score is 5.5 out of 10.