Langflow RCE under active attack months after a patch was shipped
Summary
Enterprises using the open-source AI orchestration platform Langflow are urged to patch a high-severity path traversal flaw that allows attackers to write files to arbitrary locations and potentially achieve remote code execution. This vulnerability, CVE-2026-5027, is being actively exploited despite a patch being available for months, and approximately 7,000 Langflow instances are exposed to the internet.
IFF Assessment
The active exploitation of a critical vulnerability in a popular AI platform poses a significant threat to organizations.
Severity
The CVSS score of 8.8 indicates a high-severity vulnerability. The attack vector involves path traversal within file uploads, leading to arbitrary file writes which can be escalated to remote code execution.
Defender Context
Defenders should prioritize patching the CVE-2026-5027 vulnerability in Langflow deployments. The active exploitation and ease of attack, especially with auto-login enabled, make this a critical risk, highlighting the need for prompt patching and monitoring for indicators of compromise related to arbitrary file writes and RCE.