CVE-2026-101102 deepseek-ai deepseek-harness Code Mode Sandbox run_code sandbox
Attackers can bypass the code mode sandbox to execute arbitrary code, as the vendor explicitly states the sandbox is not a security boundary.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101102?
CVE-2026-101102 is a medium-severity vulnerability in deepseek-ai deepseek-harness, published on 28 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-101102?
How do I fix CVE-2026-101102?
No fix has been published for CVE-2026-101102 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101102 being exploited?
There is no known exploitation of CVE-2026-101102 in the wild and no public exploit code.
Sources
Also known as GHSA-m9ww-cpfc-8cf2.