On point: Path-traversal vulnerability CVE-2026-5027 in Langflow is actively being exploited to inject arbitrary files on unprotected servers.
The AI development platform Langflow is currently being exploited in attacks. The security vulnerability CVE-2026-5027 allows attackers to write arbitrary files on vulnerable servers.
The high-severity path-traversal vulnerability CVE-2026-5027 affects Langflow, a platform for developing and deploying AI applications. Attackers are actively exploiting the vulnerability to uncontrollably write files on affected systems and thereby gain full control over exposed instances.
For security teams, this vulnerability is critical because Langflow is frequently used for prototyping and deploying large language model applications. A compromised system can be used not only for data exfiltration but also as a foothold for further intrusions into the infrastructure.
CISOs should immediately verify whether Langflow is deployed in their environment, particularly whether instances are directly exposed to the internet. A patch for CVE-2026-5027 should be applied as a priority; until then, affected systems should be isolated or disabled.
Source: www.bleepingcomputer.com · Published June 10, 2026
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