Langflow - RCE (CVE-2025-3248)
355Exploiting IPs reported
Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.
CrowdSec analysis
CVE-2025-3248 is a critical vulnerability in Langflow that allows unauthenticated remote code execution through a code injection flaw in a validation endpoint.
CrowdSec has been tracking this vulnerability and its exploits since 31st of March 2025.
According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2025-3248 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-3248 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-3248 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.
Observed exploitation attempts are aimed at URLs containing /api/v1/validate/code.
Exploitation
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Common Weakness Enumeration (CWE)
Protection
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Blocklist
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