CVE-2023-2905: Cesanta Mongoose

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

Due to a failure in validating the length of a provided MQTT_CMD_PUBLISH parsed message with a variable length header, Cesanta Mongoose, an embeddable web server, version 7.10 is susceptible to a heap-based buffer overflow vulnerability in the default configuration. Version 7.9 and prior does not appear to be vulnerable. This issue is resolved in version 7.11.

Affected products

• Cesanta Mongoose: version 7.10 only

Published 2023-08-09. Last modified 2026-06-17.