CISA Adds Three Known Exploited Vulnerabilities to Catalog
Overview
The Cybersecurity and Infrastructure Security Agency (CISA) has added three vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, signaling active exploitation. The vulnerabilities include a code injection issue in IBM Langflow (CVE-2026-9198), an authentication bypass in N-able N-central (CVE-2026-18556), and a lack of encryption for sensitive data in Apache Tomcat (CVE-2026-34486). These vulnerabilities are significant threats to federal agencies and other organizations, as they can allow attackers to gain control over affected systems. CISA's Binding Operational Directive 26-04 emphasizes the need for rapid remediation of these high-risk vulnerabilities, urging federal agencies to act promptly. While the directive specifically targets federal agencies, CISA encourages all organizations to prioritize addressing these vulnerabilities to enhance their security posture.
Key Takeaways
- Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
- Affected Systems: IBM Langflow, N-able N-central, Apache Tomcat
- Action Required: Federal agencies are required to rapidly remediate these vulnerabilities, especially on publicly exposed assets.
- Timeline: Newly disclosed
Original Article Summary
CISA has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-9198 IBM Langflow Code Injection Vulnerability CVE-2026-18556 N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
Impact
IBM Langflow, N-able N-central, Apache Tomcat
Exploitation Status
This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.
Timeline
Newly disclosed
Remediation
Federal agencies are required to rapidly remediate these vulnerabilities, especially on publicly exposed assets. Specific patches or updates for the mentioned vulnerabilities are not detailed in the article, but organizations should evaluate their systems for these vulnerabilities and apply necessary updates or mitigations as soon as possible.
Additional Information
This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.
Related Topics: This incident relates to CVE, Vulnerability, Patch, and 2 more.