The Bottom Line: An unpatched, already-exploited Remote Code Execution in Langflow (CVE-2026-5027) enables unauthenticated file-write attacks with no available patch.
An unpatched Remote Code Execution in Langflow (CVE-2026-5027, CVSS 8.8) is being actively exploited in the wild. The vulnerability is based on Path Traversal and enables the writing of files to arbitrary locations.
Langflow, an open-source low-code platform for building AI applications, contains a vulnerability with a CVSS score of 8.8 that is currently being exploited by attackers. This is shown by analysis from VulnCheck.
CVE-2026-5027 is a path traversal flaw that allows attackers to place files at arbitrary locations on the system. Because the vulnerability is exploitable without authentication, external actors without valid login credentials can also be targeted.
Since no patch is available, organizations with Langflow deployments should immediately review their exposure and, if possible, take affected instances offline or protect them through WAF rules. In parallel, logs should be examined for exploitation indicators.
Source: thehackernews.com · Published 10 June 2026
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