Unpatched Langflow Flaw CVE-2026-5027 Exploited for Unauthenticated RCE
Unpatched Langflow flaw CVE-2026-5027 exploited for unauthenticated RCE.
A critical path traversal vulnerability (CVE-2026-5027) in the open-source AI platform Langflow is being actively exploited. The flaw allows unauthenticated attackers to write files to arbitrary locations, leading to remote code execution due to Langflow's default unauthenticated auto-login. This exploitation follows a pattern of attacks targeting AI development tools, with thousands of Langflow instances exposed online.
AI summary of the linked source. Not reviewed by an editor. How this works
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The lesson from this incident
Full lessonA critical path traversal vulnerability (CVE-2026-5027) in Langflow allowed attackers to write files to arbitrary system locations without authentication. The exploit was amplified by Langflow's default configuration that enables automatic unauthenticated login, creating a perfect storm for remote code execution. This incident highlights the dangerous combination of unpatched vulnerabilities and insecure default configurations in AI development platforms. With thousands of exposed instances online, organizations running AI tools must prioritize both timely patching and secure configuration management.
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Indicators of Compromise
Extracted by AI from the linked source. Not reviewed by an editor. How this works
- cve — CVE-2026-5027
- cve — CVE-2026-0770
- cve — CVE-2026-33017
- cve — CVE-2026-21445
- cve — CVE-2025-34291