A critical buffer overflow vulnerability (CWE-787) has been identified in libwebsockets, a lightweight C library for network protocols. This flaw allows writing data beyond the intended buffer boundaries, impacting confidentiality, integrity, and availability. The vulnerability affects versions prior to 4.3.3-10.oe2403sp3. A patch is available in version 4.3.3-10.oe2403sp3. The CVSS 3.1 score is 8.1, indicating high severity.