GHSA-89GH-3PGC-V5H2 n8n: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data

Impact Custom HTTP headers configured in credentials for certain LLM sub-nodes including OpenAI, Anthropic, and Lemonade are masked in the n8n UI but are written in plaintext into execution data during workflow runs. Any authenticated user with access to the execution data for an affected workflo...