CVE-2026-53945

CVE-2026-53945 affects Ghost CMS: from 6.0.9 up to 6.21.1, the private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing the Ghost server to reach internal hosts through features that issue external fetches. Remediation: upgrade to Ghost 6.21.1 or later. Impact per...

GHSA-Q4X5-8CJ6-52WG Sync-in Server: SSRF protection bypass via IPv4-mapped IPv6 addresses in regExpPrivateIP

Summary: The private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses e.g. ::ffff:127.0.0.1, allowing SSRF protection to be bypassed on dual-stack systems. Affected components backend/src/applications/files/services/files-manager.service.ts –...

CVE-2026-33975 twenty-server SSRF protection bypass via IPv4-mapped IPv6 address normalization

Twenty is an open source CRM built with NestJS Node.js. In versions 1.18.0 and earlier, the SSRF protection in twenty-server's SecureHttpClientService can be bypassed using IPv4-mapped IPv6 addresses in URL IP literals. Node.js's URL parser normalizes IPv4-mapped IPv6 addresses to compressed hex...