← CVE Intelligence

CVE-2025-53539

ReDoS in fastapi-guard's penetration attempts detector PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
rennf93 / fastapi-guardaffected < 3.0.1

CWE

CWE-1333

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.