Is CVE-2026-121602 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-121602?

CVE-2026-121602 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-121602

Description

Solanum before commit 2ce64de contains a heap-based buffer overflow vulnerability that allows a malicious linked server to corrupt memory by sending overlong channel names in JOIN or SJOIN messages. Attackers controlling a peer server can trigger strcpy and sprintf overflows in ms_join and ms_sjoin to crash the ircd or potentially achieve remote code execution.