CVE-2026-84697 — Mailpit SSRF Deny List Bypass via Azure Metadata and IPv6 Prefix
Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side reque…
Published: 2026-09-02 · CVSS: 6.9 · CVSS 4.0
Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side request forgery to internal destinations. Attackers can supply hostnames resolving to these addresses in message content to reach the link check API and proxy endpoint for accessing internal resources.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7