CVE-2025-53539 Information
Jul 08, 2025
cve
Description
FastAPI Guard is a security library for FastAPI that provides middleware to control IPs log requests and detect penetration attempts. fastapi-guard’s penetration attempts detection uses regex to scan incoming requests. However some of the regex patterns used in detection are extremely inefficient and can cause polynomial complexity backtracks when handling specially crafted inputs. This vulnerability is fixed in 3.0.1.
Reference
https://github.com/rennf93/fastapi-guard/commit/d9d50e8130b7b434cdc1b001b8cfd03a06729f7f https://github.com/rennf93/fastapi-guard/security/advisories/GHSA-j47q-rc62-w448
Related CNNVD
CNNVD-202507-775 (Published: 2025-07-07)
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