CVE Catalog

CVE-2026-54412

HighCVSS 8.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.41%

35th percentile - higher than 35% of all known CVEs

Summary

LiamBindle MQTT-C versions prior to 1.1.7 contain a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response() function in src/mqtt.c. A remote unauthenticated attacker controlling an MQTT broker, or capable of injecting MQTT traffic into an unencrypted session, can crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.

Risk Assessment

An attacker can remotely crash an MQTT-C client (denial of service) and potentially read heap memory, leading to information disclosure. The risk affects systems using the vulnerable library version for MQTT communication.

Recommendation

Update MQTT-C to version 1.1.7 or later. Consider using encrypted MQTT sessions (TLS) to make traffic injection harder.

Related vulnerabilities

Original NVD description (English source)

LiamBindle MQTT-C versions prior to 1.1.7 contain a heap-based out-of-bounds read and integer underflow in the mqtt_unpack_publish_response() function in src/mqtt.c. A remote unauthenticated attacker controlling an MQTT broker, or capable of injecting MQTT traffic into an unencrypted session, can crash a subscribed MQTT-C client and potentially disclose adjacent heap memory by sending a single crafted PUBLISH packet.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS