CISA Adds Three Known Exploited Vulnerabilities to Catalog
Overview
The Cybersecurity and Infrastructure Security Agency (CISA) has added three new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, signaling that they are actively being exploited by attackers. The vulnerabilities include CVE-2026-48908, which affects JoomShaper SP Page Builder, allowing unrestricted file uploads of dangerous types; CVE-2026-55255, an authorization bypass in Langflow; and CVE-2026-56290, which involves improper access control in Joomlack Page Builder. These vulnerabilities pose significant risks, particularly to federal agencies, as they can grant attackers total control over affected systems. CISA encourages all organizations to adopt a risk-based approach to vulnerability management, emphasizing the importance of addressing these high-risk vulnerabilities swiftly. Agencies are required to check for any compromise before applying patches as part of their remediation process.
Key Takeaways
- Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
- Affected Systems: JoomShaper SP Page Builder, Langflow, Joomlack Page Builder
- Action Required: Federal agencies must prioritize remediation of these vulnerabilities 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-2026-48908 JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability CVE-2026-55255 Langflow Authorization Bypass Through User-Controlled Key Vulnerability CVE-2026-56290 Joomlack Page Builder Improper Access Control 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
JoomShaper SP Page Builder, Langflow, Joomlack Page Builder
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 must prioritize remediation of these vulnerabilities on publicly exposed assets. They should apply patches as soon as possible and check for system compromise before patching. Specific patch numbers or versions were not mentioned.
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.