Vulnerability in Deepseek Harness
CVE-2026-116367
A vulnerability was found in DeepSeek Harness up to 0.1.0-rc.5. This vulnerability affects the function createContext of the file packages/extensions/cordis-host-runner/src/sandbox.ts. The manipulation results in sandbox issue. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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 Harness — versions 0.1.0-rc.0, 0.1.0-rc.1, 0.1.0-rc.2
Weakness classification (CWE)
References
- vuldb.com/vuln/426331 (technical-description, vdb-entry)
- vuldb.com/vuln/426331/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-116367 (third-party-advisory)
- vuldb.com/submit/1012736 (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116367?
- CVE-2026-116367 is a medium-severity vulnerability in Deepseek Harness, classified under CWE-264. CVSS score: 6.3/10. Published 2026-10-26.
- How severe is CVE-2026-116367?
- Medium severity. CVSS v3 base score is 6.3 out of 10.