DeepSeek Harness Vulnerable to Indirect Prompt Injection
August 17, 2026
Security testing using AI-Infra-Guard revealed that DeepSeek Harness (DSH) is susceptible to indirect prompt injection, with some attacks reaching a 17.0% success rate. The assessment covered 14,560 executions across 16 different injection channels.
HOW THIS AFFECTS YOU
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builderYou must implement stricter input sanitization when using DSH in environments with untrusted external data.
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policyThis highlights the critical security risks inherent in autonomous agent loops using tool registries.