VOOZH about

URL: https://www.mend.io/system-prompt-hardening/

⇱ System Prompt Hardening: Secure AI Logic | Mend.io


System prompt hardening

What’s really running your AI? Expose and harden it.

Challenges

Hidden doesn’t mean harmless

System prompts are the hidden logic governing your AI’s behavior and create a massive attack surface. Weak instructions open doors for injection and data leaks.

Invisible instruction sets

System prompts operate behind the scenes, hidden from traditional scanners. This creates a critical visibility gap, leaving core AI logic unmonitored and unprotected.

Unquantifiable security risks

Without standardized metrics, security teams cannot measure vulnerability severity. This makes it extraordinarily difficult to prioritize risks or justify security resources to leadership.

No hardening standard

Developers lack a formal playbook for securing AI instructions. This absence of standards leads to inconsistent logic, increasing the risk of injection and data leaks.

Opportunities

Quantifiable system prompt defense

By detecting hidden prompts and applying a formal scoring standard, invisible vulnerabilities can be effectively prioritized and secured.

Instant visibility & labeling

Automatically detect hidden prompts and gain immediate context. By labeling prompts as “conversational,” teams can quickly identify specific attack vectors and prioritize high-risk components.

Standardized AIWE scoring

Stop guessing which threats matter. AI Weakness Enumeration (AIWE) provides a 1–100 score, allowing you to prioritize the most critical AI security risks objectively.

Proactive logic hardening

Automatically refine prompt logic to close security gaps. This ensures your AI applications are resistant to adversarial manipulation and protected against unauthorized data exposure.

The solution

Mend AI

Mend AI tests against threats like prompt injection, context leakage, and data exfiltration to uncover AI behavioral risks unique to your application.

20+ prebuilt tests for AI-specific risks

Custom test scenarios

Detailed risk analysis

Actionable remediation guidance

Exportable AI risk reports

MTTR

“One of our most indicative KPIs is the amount of time for us to remediate vulnerabilities and also the amount of time developers spend fixing vulnerabilities in our code base, which has reduced significantly. We’re talking about at least 80% reduction in time.”

Andrei Ungureanu, Security Architect
Read case study
Fast, secure, compliant

“When the product you sell is an application you develop, your teams need to be fast, secure and compliant. These three factors often work in opposite directions. Mend provides the opportunity to align these often competing factors, providing Vonage with an advantage in a very competitive marketplace.”

Chris Wallace, Senior Security Architect
Read case study
Immediate insights

“The biggest value we get out of Mend is the fast feedback loop, which enables our developers to respond rapidly to any vulnerability or license issues. When a vulnerability or a license is disregarded or blocked, and there is a policy violation, they get the feedback directly.”

Markus Leutner, DevOps Engineer for Cloud Solutions
Read case study

AI moves fast. Your security should too.

Recent resources

AI Security Governance: A Practical Framework for Security and Development Teams

Mend.io Resources Apr 7, 2026
Securing AI

Learn how to build durable AI governance that keeps pace with how your teams work.

Read more

AI Security Guide: Protecting models, data, and systems from emerging threats

Tiffany Jennings Jun 19, 2025
AI Models Risk

Learn how to protect AI systems with practical strategies and security frameworks.

Read more

AI Red Teaming Practical Guide

Mend.io Resources Sep 16, 2025
Securing AI

Discover how to protect your AI systems from emerging threats.

Read more