Cloudreve: SSRF guard bypass: checkIP does not decode IPv6-transition wrappers (NAT64, IPv4-compatible, 6to4) reaching internal and cloud-metadata addresses

Summary Cloudreve's server-side request forgery guard ValidateExternalURL pkg/request/ssrf.go resolves a user-supplied URL host and rejects it when any resolved IP is a loopback, private, link-local, multicast, unspecified, CGNAT, or the cloud-metadata address. The classification is performed by...

PT-2026-96798

Name of the Vulnerable Software and Affected Versions Cloudreve versions prior to 4.18.0 Description An authenticated user with remote-download access can perform a Server-Side Request Forgery SSRF by providing a specially crafted SrcUri through the RemoteDownloadTask.createDownloadTask function...