Langflow - RCE (CVE-2025-3248)
326Exploiting 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.
CrowdSec network observations suggest that most exploitation of CVE-2025-3248 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. In addition, according to the CrowdSec network, attack volume against CVE-2025-3248 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.
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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