Stack-based Buffer Overflow Affecting cesanta/mongoose package, versions [,7.21)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published2 Apr 2026
- disclosed2 Apr 2026
- creditthe_evilsocket
Introduced: 2 Apr 2026
CVE-2026-5245 (opens in a new tab)How to fix?
Upgrade cesanta/mongoose to version 7.21 or higher.
Overview
cesanta/mongoose is a networking library for C/C++. It implements event-driven non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT.
Affected versions of this package are vulnerable to Stack-based Buffer Overflow in the handle_mdns_record function of the mDNS Record Handler process. An attacker can execute arbitrary code or cause a denial of service by sending specially crafted data to the vulnerable argument buf.