Full Report
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added two security flaws impacting Langflow and Trend Micro Apex One to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerabilities in question are listed below - CVE-2025-34291 (CVSS score: 9.4) - An origin validation error vulnerability in Langflow that could
Analysis Summary
# Vulnerability: Langflow Origin Validation Error
## CVE Details
- **CVE ID:** CVE-2024-34291
- **CVSS Score:** 9.4 (Critical)
- **CWE:** CWE-346: Origin Validation Error
## Affected Systems
- **Products:** Langflow (An open-source UI for LangChain)
- **Versions:** All versions prior to v1.0.19
- **Configurations:** Systems running the Langflow web interface exposed to the internet or untrusted networks without updated origin validation logic.
## Vulnerability Description
CVE-2024-34291 is an origin validation error vulnerability. The application fails to properly verify the source of incoming requests, which can lead to Cross-Site Request Forgery (CSRF) or similar cross-origin attacks. In the context of Langflow, this flaw could allow an attacker to execute unauthorized actions or manipulate AI workflows by bypassing security checks intended to restrict requests to trusted origins.
## Exploitation
- **Status:** Exploited in the wild (Confirmed by CISA KEV inclusion)
- **Complexity:** Low
- **Attack Vector:** Network
## Impact
- **Confidentiality:** High (Potential access to sensitive AI flow configurations)
- **Integrity:** High (Unauthorized modification of AI models and logic)
- **Availability:** High (Potential for service disruption via unauthorized commands)
## Remediation
### Patches
- **Langflow v1.0.19:** Users should upgrade immediately to version 1.0.19 or later, which implements stricter origin validation and security fixes.
### Workarounds
- **Network Segmentation:** Ensure Langflow instances are not exposed to the public internet unless absolutely necessary.
- **Reverse Proxy:** Utilize a reverse proxy (e.g., Nginx) to enforce strict `Host` and `Origin` header validation at the network perimeter.
## Detection
- **Indicators of Compromise:** Unusual audit logs showing configuration changes or flow executions originating from unexpected IP addresses.
- **Detection methods and tools:** Monitor web server logs for requests with mismatched `Origin` or `Referer` headers. Utilize CISA’s KEV catalog monitoring to track exploitation trends.
## References
- CISA Known Exploited Vulnerabilities Catalog: hxxps[://]www[.]cisa[.]gov/known-exploited-vulnerabilities-catalog
- Langflow GitHub Repository: hxxps[://]github[.]com/langflow-ai/langflow
- NIST NVD Entry: hxxps[://]nvd[.]nist[.]gov/vuln/detail/CVE-2024-34291