CVE-2026-43929 ssrfcheck: Server-Side Request Forgery (SSRF) and Incomplete List of Disallowed Inputs

ssrfcheck is a library that checks if a string contains a potential SSRF attack. In 1.3.0 and earlier, ssrfcheck fails to block Server-Side Request Forgery attacks when the target private IP address is encoded as an IPv4-mapped IPv6 address e.g. http://::ffff:127.0.0.1/. The WHATWG URL parser bui...

EUVD-2025-22851

ssrfcheck: SSRF Bypass Caused by Failure to Classify Reserved IP Address Space as Invalid...

GHSA-C2FV-2FMJ-9XRX Duplicate Advisory: ssrfcheck has Incomplete IP Address Deny List that leads to Server-Side Request Forgery Vulnerability

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-p4hc-9pjh-55c8. This link is maintained to preserve external references. Original Description Versions of the package ssrfcheck below 1.2.0 are vulnerable to Server-Side Request Forgery SSRF due to an incomplete...

CVE-2025-8267

Versions of the package ssrfcheck before 1.2.0 are vulnerable to Server-Side Request Forgery SSRF due to an incomplete denylist of IP address ranges. Specifically, the package fails to classify the reserved IP address space 224.0.0.0/4 Multicast as invalid. This oversight allows attackers to craf...

CVE-2025-8267

Versions of the package ssrfcheck before 1.2.0 are vulnerable to Server-Side Request Forgery SSRF due to an incomplete denylist of IP address ranges. Specifically, the package fails to classify the reserved IP address space 224.0.0.0/4 Multicast as invalid. This oversight allows attackers to craf...

CVE-2025-8267

CVE-2025-8267 affects the Python/JS package ssrfcheck prior to 1.2.0, with an incomplete IP denylist failing to classify 224.0.0.0/4 (Multicast) as invalid. This enables SSRF against multicast addresses via crafted requests. Public references from Red Hat, HTC OSV, GHSA, NVD, and PT-2025-31048 co...

CVE-2025-8267

Versions of the package ssrfcheck before 1.2.0 are vulnerable to Server-Side Request Forgery SSRF due to an incomplete denylist of IP address ranges. Specifically, the package fails to classify the reserved IP address space 224.0.0.0/4 Multicast as invalid. This oversight allows attackers to craf...

PT-2025-31048

Name of the Vulnerable Software and Affected Versions ssrfcheck versions prior to 1.2.0 Description The package is vulnerable to Server-Side Request Forgery SSRF due to an incomplete denylist of IP address ranges. The package fails to classify the reserved IP address space 224.0.0.0/4 Multicast a...