Letta - RCE (CVE-2025-51482)

CVE-2025-51482 is a remote code execution vulnerability in letta-ai Letta 0.7.12, specifically within the /v1/tools/run endpoint, that allows attackers to execute arbitrary Python code and system commands by sending crafted payloads. This flaw enables threat actors to bypass intended sandbox restrictions, potentially leading to full system compromise and unauthorized access to sensitive data.

CrowdSec has been tracking this vulnerability and its exploits since 10th of September 2025.

Data from the CrowdSec community indicates that exploitation of CVE-2025-51482 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2025-51482 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2025-51482 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit this vulnerability by sending crafted POST requests to the /v1/tools/run endpoint with a JSON payload containing malicious Python code in the source_code field, enabling remote command execution on the target server.