fastapi-guard is vulnerable to ReDoS through inefficient regex

Summary fastapi-guard detects penetration attempts by using regex patterns 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. It is not as severe as...

CVE-2025-53539

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...

Regular Expression Denial of Service (ReDoS)

Overview fastapi-guard is a Security library for FastAPI to control IPs and more. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the SusPatternsManager class in the suspatternshandler.py file. An attacker can cause excessive resource consumption...

CVE-2025-53539 ReDoS in fastapi-guard's penetration attempts detector

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...

CVE-2025-53539

CVE-2025-53539 affects fastapi-guard: the DoS risk stems from inefficient regular expressions in the SusPatternsManager (suspatterns_handler.py) used to detect penetration attempts, enabling polynomial backtracking under crafted inputs. The vulnerability is documented as fixed in version 3.0.1; r...

CVE-2025-53539

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...

CVE-2025-53539 ReDoS in fastapi-guard's penetration attempts detector

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...

CVE-2025-53539 ReDoS in fastapi-guard's penetration attempts detector

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...

CVE-2025-53539: Inefficient Regular Expression Complexity

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...

PT-2025-28250

Name of the Vulnerable Software and Affected Versions: FastAPI Guard versions prior to 3.0.1 Description: The issue concerns the penetration attempts detection mechanism in FastAPI Guard, which utilizes regex patterns to scan incoming requests. However, some of these regex patterns are inefficien...

Fastapi-guard security vulnerabilities

fastapi-guard is a security library for FastAPI by Renzo F Individual Developer that provides middleware to control IPs, log requests and detect penetration attempts. A security vulnerability exists in fastapi-guard versions prior to 3.0.1, which stems from a regular expression pattern inefficien...

CVE-2025-49126

Visionatrix is an AI Media processing tool using ComfyUI. In versions 1.5.0 to before 2.5.1, the /docs/flows endpoint is vulnerable to a Reflected XSS Cross-Site Scripting attack allowing full takeover of the application and exfiltration of secrets stored in the application. The implementation us...

CVE-2025-49126 Visionatrix Vulnerable to Reflected XSS Leading to Exfiltration of Secrets

Visionatrix is an AI Media processing tool using ComfyUI. In versions 1.5.0 to before 2.5.1, the /docs/flows endpoint is vulnerable to a Reflected XSS Cross-Site Scripting attack allowing full takeover of the application and exfiltration of secrets stored in the application. The implementation us...

PT-2025-26621 · Unknown +1 · Visionatrix +1

Name of the Vulnerable Software and Affected Versions: Visionatrix versions 1.5.0 through 2.5.0 Description: The issue concerns a Reflected XSS Cross-Site Scripting attack via the "/docs/flows" endpoint, allowing full takeover of the application and exfiltration of secrets stored in the...

CVE-2025-49126: Improper Neutralization of Input During Web Page Generation

Visionatrix is an AI Media processing tool using ComfyUI. In versions 1.5.0 to before 2.5.1, the /docs/flows endpoint is vulnerable to a Reflected XSS Cross-Site Scripting attack allowing full takeover of the application and exfiltration of secrets stored in the application. The implementation us...

CVE-2024-40627

Fastapi OPA is an opensource fastapi middleware which includes auth flow. HTTP OPTIONS requests are always allowed by OpaMiddleware, even when they lack authentication, and are passed through directly to the application. OpaMiddleware allows all HTTP OPTIONS requests without evaluating it against...

CVE-2024-42818

A cross-site scripting XSS vulnerability in the Config-Create function of fastapi-admin pro v0.1.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Product Name parameter...

CVE-2024-42816

A cross-site scripting XSS vulnerability in the Create Product function of fastapi-admin pro v0.1.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Product Name parameter...

CVE-2025-46814

FastAPI Guard is a security library for FastAPI that provides middleware to control IPs, log requests, and detect penetration attempts. An HTTP header injection vulnerability has been identified in versions prior to 2.0.0. By manipulating the X-Forwarded-For header, an attacker can potentially...

Use of Less Trusted Source

Overview fastapi-guard is a Security library for FastAPI to control IPs and more. Affected versions of this package are vulnerable to Use of Less Trusted Source via the manipulation of the X-Forwarded-For header. An attacker can inject arbitrary IP addresses into the request by manipulating this...