CVE-2026-42261

PromptHub is an all-in-one AI toolbox for prompt, skill, and agent management. From version 0.4.9 to before version 0.5.4, apps/web/src/routes/skills.ts exposes an authenticated endpoint POST /api/skills/fetch-remote that fetches a user-supplied URL server-side and reflects the response body up t...

AgentSmith Flaw in LangSmith’s Prompt Hub Exposed User API Keys, Data

A CVSS 8.8 AgentSmith flaw in LangSmith's Prompt Hub exposed AI agents to data theft and LLM manipulation. Learn how malicious AI agents could steal API keys and hijack LLM responses. Fix deployed...