An update for libwebsockets is now available for openEuler-24.03-LTS-SP4 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-4741 Final 1.0 1.0 2026-11-11 Initial 2026-11-11 2026-11-11 openEuler SA Tool V1.0 2026-11-11 libwebsockets security update An update for libwebsockets is now available for openEuler-24.03-LTS-SP4 Libwebsockets (LWS) is a flexible, lightweight pure C library for implementing modern network protocols easily with a tiny footprint, using a nonblocking event loop. Security Fix(es): libwebsockets MQTT Protocol PUBACK Packet Handling Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of PUBACK packets. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31039.(CVE-2026-114550) An update for libwebsockets is now available for openEuler-24.03-LTS-SP4. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High libwebsockets https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4741 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-114550 https://nvd.nist.gov/vuln/detail/CVE-2026-114550 openEuler-24.03-LTS-SP4 libwebsockets-4.3.3-10.oe2403sp4.aarch64.rpm libwebsockets-debuginfo-4.3.3-10.oe2403sp4.aarch64.rpm libwebsockets-debugsource-4.3.3-10.oe2403sp4.aarch64.rpm libwebsockets-devel-4.3.3-10.oe2403sp4.aarch64.rpm libwebsockets-4.3.3-10.oe2403sp4.src.rpm libwebsockets-4.3.3-10.oe2403sp4.x86_64.rpm libwebsockets-debuginfo-4.3.3-10.oe2403sp4.x86_64.rpm libwebsockets-debugsource-4.3.3-10.oe2403sp4.x86_64.rpm libwebsockets-devel-4.3.3-10.oe2403sp4.x86_64.rpm libwebsockets-help-4.3.3-10.oe2403sp4.noarch.rpm libwebsockets MQTT Protocol PUBACK Packet Handling Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of PUBACK packets. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31039. 2026-11-11 CVE-2026-114550 openEuler-24.03-LTS-SP4 High 8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H libwebsockets security update 2026-11-11 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4741