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CVE-2026-45123 MyBB: IPv6 SSRF

🗓️ 18 Aug 2026 15:44:26Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 3 Views

MyBB prior to 1.8.40 allows IPv6 SSRF via fail-open host verification in fetch_remote_file().

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20 Aug 2026 03:54Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.14.3
3