Privilege Abuse

A flaw in n8n-MCP's multi-tenant HTTP mode allowed an authenticated tenant to access or delete workflow-version backups belonging to the default scope rather than being confined to their own tenant. This could expose or destroy legacy backup data left over from prior single-tenant deployments or migrations. The issue is fixed in version 2.57.4.

Updated Jul 16, 2026 · CVSS 4.2

n8n-MCP, an MCP server exposing n8n workflow automation to AI assistants, failed to isolate workflow version history backups between tenants when multi-tenancy was enabled. Any authenticated tenant could read, delete, or destroy other tenants' backup snapshots, which contained full node definitions, credential references, and authorization headers. This is a severe cross-tenant data exposure and destruction flaw fixed in version 2.56.1.

Updated Jul 16, 2026 · CVSS 9.9

A Drupal contributed module named 'AI Agents' has an access control flaw that allows forceful browsing, meaning unauthorized users may reach pages or functionality they shouldn't have access to. This is a standard web application authorization bug rather than a novel AI agent security issue, and no evidence in the data suggests prompt injection, tool poisoning, or agent-to-agent exploitation. Severity is moderate given the lack of CVSS score and limited detail on what functionality is exposed.

Updated Jul 11, 2026

A Drupal contributed module called 'AI Agents' has a missing authorization vulnerability allowing forceful browsing, meaning certain pages or endpoints may be accessible without proper permission checks. This is a standard web application access-control flaw in a CMS module that happens to relate to AI agent functionality, rather than a novel AI-specific attack technique. Severity is moderate since exploitation depends on the module's deployment and what functionality is exposed without authorization.

Updated Jul 11, 2026

A vulnerability in n8n's AI Agents feature allowed a low-privilege user with only 'use' access to a shared credential to bypass the configured Allowed HTTP Request Domains restriction by pointing an MCP tool at an arbitrary attacker-controlled URL. This let the attacker exfiltrate the credential's secret value to an external server, effectively escalating from use-only access to full credential disclosure. The issue is fixed in n8n 2.27.4 and 2.28.1.

Updated Jul 9, 2026

Langflow, a popular visual builder for LLM/agent workflows, has an authorization bypass that lets an authenticated user execute any other user's flow simply by supplying that victim's flow ID. This is a classic insecure direct object reference (IDOR) that fails to verify flow ownership before execution, allowing cross-tenant abuse in multi-user deployments. CISA has added it to the Known Exploited Vulnerabilities catalog, indicating active exploitation and urgency to patch.

Updated Jul 8, 2026