CVE-2008-4631: Stack-based buffer overflow in the Message::AddToString function in message/Message.cpp in MUSCLE before 4....

Security readout for executives and security teams

MUSCLE versions before 4.40 reportedly contain a memory corruption flaw that can be triggered by a crafted message. A successful attack could crash the service and may allow arbitrary code execution. The provided sources do not show active exploitation or a CVSS score, so urgency depends on whether legacy MUSCLE is reachable by untrusted users. Exposure is likely limited to applications or services using MUSCLE before 4.40 and accepting untrusted message input. The source bundle does not identify specific downstream products, packages, or default deployment patterns. Treat this as a targeted legacy dependency risk. It is not KEV-listed in the provided data, but possible remote code execution makes exposed uses important to find and retire quickly. Mitigation focus: Identify any MUSCLE dependency or embedded source older than version 4.40.; Upgrade or replace affected MUSCLE code following vendor guidance and HISTORY notes.; Restrict untrusted network access to services that parse MUSCLE messages..

Prepared

Jun 28, 2026, 11:59 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.