CVE-2023-50784: Unrealircd

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

A buffer overflow in websockets in UnrealIRCd 6.1.0 through 6.1.3 before 6.1.4 allows an unauthenticated remote attacker to crash the server by sending an oversized packet (if a websocket port is open). Remote code execution might be possible on some uncommon, older platforms.

Affected products

• Unrealircd Unrealircd: from 6.1.0, before 6.1.4 (fixed in 6.1.4)

Published 2023-12-16. Last modified 2026-06-17.