CVE-2023-30362: Libcoap

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.

Affected products

• Libcoap Libcoap: before 4.3.1-120-ge242200 (fixed in 4.3.1-120-ge242200)

Published 2023-06-23. Last modified 2026-06-17.