CVE-2026-101102: deepseek-harness Vulnerability (CVSS 6.3)

Description

A vulnerability was found in deepseek-ai deepseek-harness up to 0.1.0-rc.7. Impacted is the function run_code of the component Code Mode Sandbox. The manipulation results in sandbox issue. The attack can be executed remotely. The vendor's own code, SAFETY.md, and design notes all explicitly state the worker is "containment, not a security boundary". The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

CVSS 3.1

6.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS 4.0

5.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
deepseek-ai	deepseek-harness	0.1.0-rc.0; 0.1.0-rc.1; 0.1.0-rc.2; 0.1.0-rc.3; 0.1.0-rc.4; 0.1.0-rc.5; 0.1.0-rc.6; 0.1.0-rc.7

References

Timeline

Published: Sep 28, 2026
Last Modified: Sep 28, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-101102?

A vulnerability was found in deepseek-ai deepseek-harness up to 0.1.0-rc.7. Impacted is the function run_code of the component Code Mode Sandbox. The manipulation results in sandbox issue. The attack can be executed remotely. The vendor's own code, SAFETY.md, and design notes all explicitly state the worker is "containment, not a security boundary". The vendor was contacted early about this disclosure but did not respond in any way.

How severe is CVE-2026-101102?

CVE-2026-101102 has a CVSS score of 6.3/10 (MEDIUM severity).

How do I fix CVE-2026-101102?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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