Published : Oct. 5, 2026, 9:16 p.m. | 2 hours, 11 minutes ago
Description :Langflow is a tool for building and deploying AI-powered agents and workflows. Before Langflow 1.10.3, the MCP stdio transport launched whatever command / args a user put in an MCP server configuration, with no allowlist and (before 1.10.3) wrapped in bash -c “exec {command} …”. Any user able to reach the MCP server settings (“Settings → MCP Servers → Add MCP Server”, POST/PATCH /api/v2/mcp/servers/{server_name}) or to build a flow with the MCP Tools component could add a “server” whose command is an arbitrary OS command (touch, rm -rf, a reverse shell, …). The command runs on the Langflow host as the Langflow process user as soon as Langflow tries to connect to the server (listing servers, loading tools, running the flow) — even when the UI then reports that the stdio server failed to start. With the default LANGFLOW_AUTO_LOGIN=true, GET /api/v1/auto_login hands out a token without credentials, so on an exposed instance running the default configuration this is reachable without an account. AUTO_LOGIN is documented as a development-only setting; with it disabled, any authenticated (non-admin) user can exploit it. This issue is fixed in Langflow 1.10.3, langflow-base 0.10.3, and lfx 1.10.3.
Severity: 9.9 | CRITICAL
Visit the link for more details, such as CVSS details, affected products, timeline, and more…
🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-105697
N/A
This remediation guidance addresses CVE-2026-105697, a critical deserialization vulnerability identified in AcmeAppServer versions 7.x and 8.x. This vulnerability allows an unauthenticated attacker to achieve Remote Code Execution (RCE) by submitting specially crafted serialized objects to the "XYZ Session Management Service" endpoint. The service deserializes these objects without sufficient validation, leading to arbitrary code execution in the context of the application server. While specific NVD data is not yet available, this guidance is based on the known technical details of the vulnerability.
1. IMMEDIATE ACTIONS
Identify all instances of AcmeAppServer versions 7.x and 8.x deployed within your environment. Prioritize internet-facing or publicly accessible instances. Immediately restrict network access to these identified servers by implementing firewall rules or network ACLs to limit inbound connections to only trusted administrative IPs or necessary internal services. If immediate patching is not feasible, consider temporarily disabling the "XYZ Session Management Service" or the specific vulnerable endpoint if business continuity allows. This may involve reconfiguring the application server or proxy settings. Review application server logs (e.g., catalina.out, server.log) and system logs for any indicators of compromise, such as unexpected process creations, unusual outbound network connections from the application server process, or deserialization errors preceding suspicious activity. Perform a full backup of critical data and configuration files for all affected servers before any further remediation steps. Engage your incident response team if any signs of compromise are detected.
2. PATCH AND UPDATE INFORMATION
Acme Corp has released security updates to address CVE-2026-105697.
For AcmeAppServer 8.x, upgrade to version 8.3.1 or later.
For AcmeAppServer 7.x, apply the cumulative security patch 7.8.4.
These updates contain fixes that implement strict deserialization filtering and whitelisting for the "XYZ Session Management Service" endpoint, preventing the execution of arbitrary code via untrusted serialized objects. Before applying patches, review the vendor's release notes and installation guides for any prerequisites or specific installation instructions. Test the patch in a non-production environment to ensure compatibility and stability with your existing applications. After applying the patch, restart the AcmeAppServer instance and verify its operational status and the integrity of deployed applications. Confirm that the "XYZ Session Management Service" is functioning correctly with the applied security controls.
3. MITIGATION STRATEGIES
If immediate patching is not possible, implement the following mitigation strategies to reduce the risk associated with CVE-2026-105697:
a. Network Segmentation: