Full Report
Threat actors are exploiting an unauthenticated remote code execution vulnerability (CVE-2026-0768) in Langflow, an open-source framework for building AI applications, to steal credentials, tokens, and keys. [...]
Analysis Summary
# Vulnerability: Unauthenticated RCE in Langflow Code Validator
## CVE Details
- **CVE ID:** CVE-2026-0768
- **CVSS Score:** 10.0 (Critical) - per NVD/ZDI assessment
- **CWE:** CWE-94 (Improper Control of Generation of Code / Code Injection)
## Affected Systems
- **Products:** Langflow (Open-source AI application framework)
- **Versions:** 1.4.2 and all earlier versions.
- **Configurations:** Systems where the `validate` endpoint is accessible without authentication.
## Vulnerability Description
The flaw exists within the handling of the `code` parameter provided to the Langflow `validate` endpoint. The application fails to properly validate or sanitize user-supplied strings before passing them to a Python execution function. Because Langflow often runs with elevated permissions to manage system resources, an unauthenticated remote attacker can send a crafted request to execute arbitrary Python code with root privileges.
## Exploitation
- **Status:** **Exploited in the wild.** Significant activity detected by VulnCheck honeypots (360+ attempts) originating primarily from Russia.
- **Complexity:** Low
- **Attack Vector:** Network (Remote)
## Impact
- **Confidentiality:** Total (Attackers are actively harvesting `LANGFLOW_SUPERUSER` credentials, AWS access keys, OpenAI API keys, and SSH keys).
- **Integrity:** Total (Unrestricted command execution allows for system modification).
- **Availability:** Total (Potential for full system takeover or shutdown).
## Remediation
### Patches
- **Recommended Action:** Upgrade to **Langflow version 1.11.6** or later. This version addresses CVE-2026-0768 along with several other recently exploited flaws (CVE-2026-33017, CVE-2026-0770, etc.).
### Workarounds
- **Network Segmentation:** Ensure Langflow instances are not exposed directly to the public internet.
- **Access Control:** Implement strict IP whitelisting or place the application behind a VPN/Identity-Aware Proxy (IAP).
- **Principle of Least Privilege:** Avoid running Langflow as the `root` user to limit the blast radius of potential RCE.
## Detection
- **Indicators of Compromise:**
- Unauthorized access to the `/validate` endpoint in web server logs.
- Presence of reconnaissance commands in `.bash_history`.
- Unusual outbound connections to known malicious IPs (specifically originating from Russia-based infrastructure in recent campaigns).
- **Detection methods:**
- Monitor environment variable access for sensitive strings: `OPENAI_API*`, `AWS_ACCESS*`, and `AWS_SECRET*`.
- Audit file access logs for `~/.cache/langflow/secret_key`.
## References
- **Vendor GitHub:** hxxps[://]github[.]com/langflow-ai/langflow
- **NVD Entry:** hxxps[://]nvd[.]nist[.]gov/vuln/detail/CVE-2026-0768
- **ZDI Advisory:** hxxps[://]www[.]zerodayinitiative[.]com/advisories/ZDI-26-034/
- **Original Report:** hxxps[://]www[.]bleepingcomputer[.]com/news/security/critical-langflow-flaw-exploited-to-steal-openai-and-aws-keys/