Discover CVE-2025-34291: Major Langflow AI Vulnerability Uncovered

Executive Summary

Obsidian Security has revealed a significant vulnerability, CVE-2025-34291, in Langflow, a widely-used open-source AI platform. This critical flaw, rated 9.4 on the CVSS v4.0 scale, allows attackers to execute remote code and completely take over accounts by merely luring users to malicious websites. The vulnerability stems from a combination of overly permissive CORS settings, insufficient CSRF protections, and unsafe code validation endpoints, posing serious risks to sensitive data within user workspaces.

👉 Read the full article from Obsidian Security here for comprehensive insights.

Key Insights

Overview of the Vulnerability

• CVE-2025-34291 allows attackers to exploit a critical vulnerability chain in Langflow.
• The flaw can lead to complete account takeover and remote code execution.
• Langflow has over 140K GitHub stars, indicating its popularity and widespread use.

Technical Exploitation

• The vulnerability exploits three main weaknesses: overly permissive CORS, lack of CSRF protection, and an insecure code validation endpoint.
• Users clicking on malicious links can unwittingly give attackers access to their accounts and sensitive data.

Impact on Users

• Successful exploitation can lead to the exposure of sensitive access tokens and API keys stored within Langflow workspaces.
• This vulnerability presents the risk of cascading compromises across all integrated applications connected to the Langflow instance.

Mitigation Strategies

• Obsidian Security recommends several best practices, including tightening CORS settings and implementing robust CSRF protection.
• Developers should avoid using insecure endpoints that allow arbitrary code execution without proper validation and controls.

👉 Access the full expert analysis and actionable security insights from Obsidian Security here.