Out-of-bounds Read Affecting FreeRTOS/coreMQTT package, versions [,5.0.1)
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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Test your applications- Snyk IDSNYK-UNMANAGED-FREERTOSCOREMQTT-16702772
- published16 May 2026
- disclosed15 May 2026
- creditEpsilon
Introduced: 15 May 2026
CVE-2026-8686 (opens in a new tab)How to fix?
Upgrade FreeRTOS/coreMQTT to version 5.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read due to missing bounds validation in the property parser. An attacker can cause a system crash or service interruption by sending a specially crafted MQTT packet.