Patch Tuesday, April 2026 Edition
Krebs on Security covers April 2026 patching activity, including a record-sized Microsoft release and active exploitation notes.
AI Red Teaming
Methods, case studies, and tooling for red teaming AI systems end to end.
ai red teamingllm red teamingjailbreakadversarial testingpyritpromptfoo
OpenAI to acquire Promptfoo
OpenAI announced plans to acquire Promptfoo, highlighting automated AI security testing, red teaming, and evaluation as core enterprise requirements.
MITRE ATLAS OpenClaw Investigation Discovers New and Likeliest Techniques
MITRE maps incident patterns in an open-source agentic ecosystem to ATLAS techniques, showing how AI-first systems create distinct execution paths for attackers.
Continuously hardening ChatGPT Atlas against prompt injection attacks
OpenAI describes using automated red teaming and reinforcement learning to discover agent prompt injection attacks before they appear in the wild.
Progress from our Frontier Red Team
Anthropic shares lessons from frontier red teaming and discusses where models are showing early-warning signs of higher-risk cyber and biology capabilities.
Enhancing AI safety: Insights and lessons from red teaming
Microsoft summarizes lessons from red teaming more than one hundred generative AI products, emphasizing system-level testing, human expertise, and automation.
3 takeaways from red teaming 100 generative AI products
Microsoft Security highlights practical red-team lessons, including prompt injections against multimodal systems and the need to stay grounded in basic cyber hygiene.