Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/axllent/mailpit
- https://github.com/axllent/mailpit/blob/v1.31.0/internal/tools/net.go
- https://github.com/axllent/mailpit/commit/a02821bf3424da9196e156c422370f4868a1df
- https://www.vulncheck.com/advisories/mailpit-ssrf-deny-list-bypass-via-azure-met
FAQ
What is CVE-2026-84697?
CVE-2026-84697 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2026-84697?
CVE-2026-84697 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-84697?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.