Full Report
The U.S. Cybersecurity & Infrastructure Security Agency (CISA) has tagged a Langflow remote code execution vulnerability as actively exploited, urging organizations to apply security updates and mitigations as soon as possible. [...]
Analysis Summary
# Vulnerability: Critical Unauthenticated RCE in Langflow
## CVE Details
- CVE ID: CVE-2025-3248
- CVSS Score: Not explicitly provided, but described as **Critical** with active exploitation.
- CWE: Not explicitly provided. (Likely related to Improper Input Validation or Remote Code Execution).
## Affected Systems
- Products: Langflow (AI application development framework)
- Versions: Versions prior to 1.3.0.
- Configurations: Any internet-exposed instance.
## Vulnerability Description
The vulnerability is a critical Remote Code Execution (RCE) flaw within Langflow that allows for unauthenticated execution of arbitrary code on the server hosting the application. This flaw is noted as the first truly unauthenticated RCE issue identified in Langflow, often due to the tool's design which historically included RCE capabilities "by design" relating to its intended data workflow functionality, but this specific flaw bypasses authentication.
## Exploitation
- Status: **Exploited in the wild**
- Complexity: Implied **Low** (as it is unauthenticated and actively exploited).
- Attack Vector: **Network** (Remote).
## Impact
- Confidentiality: **High** (Likely full system compromise possible via RCE)
- Integrity: **High** (Likely full system compromise possible via RCE)
- Availability: **High** (System downtime or complete takeover possible)
## Remediation
### Patches
- **Upgrade to Langflow version 1.3.0 or later.** (Version 1.3.0 was released on April 1, 2025).
- **Recommended upgrade to Langflow version 1.4.0** (The latest version containing other fixes).
### Workarounds
- Restrict network access to the Langflow deployment by placing it behind a firewall, an authenticated reverse proxy, or a VPN.
- Avoid direct internet exposure of the Langflow service.
## Detection
- Detection details were not explicitly provided in the summary, but focus should be placed on monitoring network traffic attempting to exploit the vulnerable endpoint (which the patch secured via authentication).
- CISA advises federal agencies to apply mitigations by May 26, 2025.
## References
- Vendor Advisory/Technical Details: hxxps://horizon3.ai/attack-research/disclosures/unsafe-at-any-speed-abusing-python-exec-for-unauth-rce-in-langflow-ai/
- Patch Information (1.3.0): hxxps://github.com/langflow-ai/langflow/releases/tag/1.3.0
- Patch Information (1.4.0): hxxps://github.com/langflow-ai/langflow/releases/tag/1.4.0
- CISA Alert: hxxps://www.cisa.gov/news-events/alerts/2025/05/05/cisa-adds-one-known-exploited-vulnerability-catalog