Langflow - RCE (CVE-2025-3248)
171Exploiting 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.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2025-3248 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2025-3248. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.
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
With our advanced worldwide network detection, CrowdSec can provide a list of IPs known for exploiting the vulnerability.
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