Rebuff
Open SourceAbout Rebuff
Rebuff is an open-source tool that detects prompt injection attacks on AI applications. It checks input with four layers of defense. Its README describes it as a prototype.
From Rebuff's own website, read 2026-10-28. How we build listings.
How to evaluate Application Security
This is how the CIOPages Research Team evaluates this category. It is not an assessment of Rebuff. It comes from our DevSecOps & Application Security Testing buyer guide.
25%
Finding Accuracy & Risk Prioritization
False-positive and false-negative rates on your own code; reachability analysis (is the vulnerable function actually called?); runtime/exposure context; EPSS/CVSS-based scoring; how a flood of findings collapses to a short, ranked, defensible work queue
20%
Developer Workflow Integration
Native IDE plugins, PR/MR checks and inline comments, SCM (GitHub/GitLab/Bitbucket/Azure DevOps) and CI/CD integration, quality/security gates, credible one-click autofix, and how little context-switching a developer needs to remediate
20%
Scanning Coverage & Engine Depth
SAST, SCA, secrets, IaC, container, and DAST/API coverage; supported languages and frameworks; vulnerability and malicious-package intelligence; SBOM generation and open-source license analysis; scan speed on large monorepos
15%
ASPM & Consolidation
De-duplication and correlation across first- and third-party scanners, code-to-cloud/runtime context, application risk graph or single risk score per app, policy-as-code, and openness to ingesting tools you already own rather than locking you in
10%
AI-Generated Code Security
Detection of AI-assisted/AI-authored code, guardrails for coding-assistant and agentic workflows, security of LLM/MCP integrations and open-source AI models, and whether the platform keeps pace with code generated faster than humans review it
10%
Governance, Compliance & Deployment
RBAC/SSO, audit trails and attestation, policy gates mapped to PCI-DSS/SOC 2/NIST SSDF, SBOM/VEX export, SaaS vs. self-managed/air-gapped and FedRAMP options, and clean API/data export for your own reporting
Other Application Security Vendors
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Quick Facts
rebuff.aiCategoryCybersecurity
SubcategoryApplication Security
DeploymentSelf-hosted
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