CVE-2026-108789 deepseek-ai deepseek-harness dsh-workflow-worker-thread agent behavioral workflow
Attackers can bypass behavioral workflow enforcement in the deepseek-harness agent component, potentially manipulating AI agent actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-108789?
CVE-2026-108789 is a medium-severity vulnerability in deepseek-ai deepseek-harness, published on 12 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-108789?
How do I fix CVE-2026-108789?
No fix has been published for CVE-2026-108789 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108789 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108789 exists.
Sources
Also known as GHSA-wc99-rg5g-w3c8.