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.
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Mon, 07 Jul 2025 21:15:00 +0000
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Mon, 07 Jul 2025 19:30:00 +0000
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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. | |
Title | ReDoS in fastapi-guard's penetration attempts detector | |
Weaknesses | CWE-1333 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2025-07-07T19:16:02.559Z
Updated: 2025-07-07T20:51:58.541Z
Reserved: 2025-07-02T15:15:11.515Z
Link: CVE-2025-53539

Updated: 2025-07-07T20:51:49.329Z

Status : Awaiting Analysis
Published: 2025-07-07T20:15:28.027
Modified: 2025-07-08T16:18:34.923
Link: CVE-2025-53539

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