CVE-2026-84697: Server-Side Request Forgery (SSRF) in axllent mailpit
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.
CVE-2026-84697: Server-Side Request Forgery (SSRF) in axllent mailpit
Description
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.
CVSS v4.0
Score 6.9medium
Affected software
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Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-01T23:24:24.109Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
Threat ID: 6a977a61acd9273b49923c31
Added to database: 09/02/2026, 01:22:41 UTC
Last updated: 09/02/2026, 02:07:19 UTC
Views: 5
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