The US Cybersecurity and Infrastructure Security Agency (CISA) is warning about yet another Langflow vulnerability (CVE-2026-55255) leveraged by attackers in the wild. The flaw was added to the agency’s Known Exploited Vulnerabilities catalog on Tuesday, July 7, nearly two weeks after the Sysdig Threat Research Team observed it being actively targeted. CVE-2026-55255 exploited Langflow is an open-source visual framework for building AI agents and workflows, widely used by individual developers, enterprises, and service providers. CVE-2026-55255 … More → The post Attackers using Langflow flaw for credential harvesting (CVE-2026-55255) appeared first on Help Net Security .

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 ....

Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request.