Promptfoo: LLM Red Teaming Against OWASP Top 10
Promptfoo is an open-source tool designed for red teaming LLM-powered products against the OWASP LLM Top 10 security vulnerabilities. The 2025 edition of the OWASP LLM Top 10 introduces new categories and revisions to better reflect real-world threats. Promptfoo, which has been adopted by many Fortune 500 companies, allows for the generation and evaluation of adversarial probes to enhance security measures.
- ▪The OWASP LLM Top 10 2025 includes significant updates, such as new categories and a reordering based on real-world incident data.
- ▪Promptfoo was acquired by OpenAI in March 2026 and is used by over 25% of Fortune 500 companies for LLM evaluation.
- ▪The tool separates adversarial probe generation from evaluation, ensuring sensitive data remains secure.
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| Original publisher | DEV.to (Top) |
| Canonical URL | https://dev.to/jangwook_kim_e31e7291ad98/promptfoo-llm-red-teaming-against-owasp-top-10-4m4l |
| Publication time | Wed, 20 May 2026 04:17:47 +0000 |
| Retrieval time | 2026-05-20T04:34:59.721Z |
| Last seen | 2026-05-20T04:34:59.721Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 5hXC-1DT46Zb |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 1909290) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Jangwook Kim Posted on May 20 • Originally published at effloow.com Promptfoo: LLM Red Teaming Against OWASP Top 10 #security #llm #redteaming #owasp If you ship an LLM-powered product and have not run a structured red team against it, you are flying blind on security.
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