CVE-2026-19300

IBM Langflow OSS versions 1.0.0 through 1.11.2 are affected by an information disclosure vulnerability in the unauthenticated public flow endpoint. The endpoint uses a heuristic denylist to scrub stored secrets from node templates, but omits fields such as Authentication, X-Session-Id, App-Key, a...

CVE-2026-19300 Langflow is vulnerable to information disclosure due to cross-user MCP tool cache collision and incomplete secret scrubbing on public flows

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote attacker to obtain sensitive information due to incomplete scrubbing of sensitive credential fields...

Security Bulletin: Langflow is vulnerable to information disclosure due to cross-user MCP tool cache collision and incomplete secret scrubbing on public flows

Summary Langflow contains two authenticated information disclosure vulnerabilities. The MCP Tools component caches discovered tools in a shared process-local cache keyed only by the MCP server display name without including the user, session, flow, or resolved configuration; when two authenticate...