CVE-2026-108789: medium-severity vulnerability in deepseek-ai deepseek-harness
deepseek-ai deepseek-harness dsh-workflow-worker-thread agent behavioral workflow
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.1epss 0.2%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
deepseek-ai · deepseek-harnesspublic PoCs found — 1
cve_referencemcniyfj5bw9b.feishu.cn/docx/M5H6d9AbioNftYxwk9CchJgGnHcunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — deepseek-ai deepseek-harness
In the same product, most dangerous first.
CVE-2026-101102MEDIUMdeepseek-ai deepseek-harness Code Mode Sandbox run_code sandboxEPSS 0.2%CVE-2026-108788MEDIUMdeepseek-ai deepseek-harness Sandbox spawn sandboxEPSS 0.1%CVE-2026-101131MEDIUMdeepseek-ai deepseek-harness dsh index.ts reliance on untrusted inputs in a security decisionEPSS 0.1%CVE-2026-101078MEDIUMdeepseek-ai deepseek-harness Landlock Backend profiles.ts isolationEPSS 0.1%
References
https://github.com/deepseek-ai/deepseek-harness/https://github.com/deepseek-ai/deepseek-harness/discussions/243https://mcniyfj5bw9b.feishu.cn/docx/M5H6d9AbioNftYxwk9CchJgGnHchttps://vuldb.com/cve/CVE-2026-108789https://vuldb.com/submit/959699https://vuldb.com/vuln/416568https://vuldb.com/vuln/416568/cti