{"id":"OESA-2026-4076","summary":"libwebsockets security update","details":"Libwebsockets (LWS) is a flexible, lightweight pure C library for implementing modern network protocols easily with a tiny footprint, using a nonblocking event loop.\r\n\r\nSecurity Fix(es):\n\nlibwebsockets HTTP/2 HPACK Path Header Parsing 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.\n\nThe specific flaw exists within the parsing of HTTP/2 HPACK path header. 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-31036.(CVE-2026-19773)\n\nA vulnerability classified as critical was found in warmcat libwebsockets 4.5.0. The vulnerability is in the function report_raw_cbor in lib/misc/lecp.c when handling LECP CBOR recordings. This issue allows an out-of-bounds write (CWE-787), which could affect confidentiality, integrity, and availability. A proof-of-concept exploit is available.(CVE-2026-78161)","modified":"2026-09-25T01:45:10.370172076Z","published":"2026-09-25T01:28:08Z","upstream":["CVE-2026-19773","CVE-2026-78161"],"database_specific":{"severity":"High"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4076"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19773"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78161"}],"affected":[{"package":{"name":"libwebsockets","ecosystem":"openEuler:24.03-LTS-SP1","purl":"pkg:rpm/openEuler/libwebsockets&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-8.oe2403sp1"}]}],"ecosystem_specific":{"src":["libwebsockets-4.3.3-8.oe2403sp1.src.rpm"],"x86_64":["libwebsockets-4.3.3-8.oe2403sp1.x86_64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp1.x86_64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp1.x86_64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp1.x86_64.rpm"],"aarch64":["libwebsockets-4.3.3-8.oe2403sp1.aarch64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp1.aarch64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp1.aarch64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp1.aarch64.rpm"],"noarch":["libwebsockets-help-4.3.3-8.oe2403sp1.noarch.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4076.json"}},{"package":{"name":"libwebsockets","ecosystem":"openEuler:24.03-LTS-SP3","purl":"pkg:rpm/openEuler/libwebsockets&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-8.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["libwebsockets-4.3.3-8.oe2403sp3.aarch64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp3.aarch64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp3.aarch64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp3.aarch64.rpm"],"noarch":["libwebsockets-help-4.3.3-8.oe2403sp3.noarch.rpm"],"src":["libwebsockets-4.3.3-8.oe2403sp3.src.rpm"],"x86_64":["libwebsockets-4.3.3-8.oe2403sp3.x86_64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp3.x86_64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp3.x86_64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp3.x86_64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4076.json"}},{"package":{"name":"libwebsockets","ecosystem":"openEuler:24.03-LTS-SP4","purl":"pkg:rpm/openEuler/libwebsockets&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-8.oe2403sp4"}]}],"ecosystem_specific":{"src":["libwebsockets-4.3.3-8.oe2403sp4.src.rpm"],"x86_64":["libwebsockets-4.3.3-8.oe2403sp4.x86_64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp4.x86_64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp4.x86_64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp4.x86_64.rpm"],"aarch64":["libwebsockets-4.3.3-8.oe2403sp4.aarch64.rpm","libwebsockets-debuginfo-4.3.3-8.oe2403sp4.aarch64.rpm","libwebsockets-debugsource-4.3.3-8.oe2403sp4.aarch64.rpm","libwebsockets-devel-4.3.3-8.oe2403sp4.aarch64.rpm"],"noarch":["libwebsockets-help-4.3.3-8.oe2403sp4.noarch.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4076.json"}},{"package":{"name":"libwebsockets","ecosystem":"openEuler:20.03-LTS-SP4","purl":"pkg:rpm/openEuler/libwebsockets&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-11.oe2003sp4"}]}],"ecosystem_specific":{"src":["libwebsockets-4.3.0-11.oe2003sp4.src.rpm"],"x86_64":["libwebsockets-4.3.0-11.oe2003sp4.x86_64.rpm","libwebsockets-debuginfo-4.3.0-11.oe2003sp4.x86_64.rpm","libwebsockets-debugsource-4.3.0-11.oe2003sp4.x86_64.rpm","libwebsockets-devel-4.3.0-11.oe2003sp4.x86_64.rpm"],"aarch64":["libwebsockets-4.3.0-11.oe2003sp4.aarch64.rpm","libwebsockets-debuginfo-4.3.0-11.oe2003sp4.aarch64.rpm","libwebsockets-debugsource-4.3.0-11.oe2003sp4.aarch64.rpm","libwebsockets-devel-4.3.0-11.oe2003sp4.aarch64.rpm"],"noarch":["libwebsockets-help-4.3.0-11.oe2003sp4.noarch.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4076.json"}},{"package":{"name":"libwebsockets","ecosystem":"openEuler:22.03-LTS-SP4","purl":"pkg:rpm/openEuler/libwebsockets&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-11.oe2203sp4"}]}],"ecosystem_specific":{"src":["libwebsockets-4.3.0-11.oe2203sp4.src.rpm"],"x86_64":["libwebsockets-4.3.0-11.oe2203sp4.x86_64.rpm","libwebsockets-debuginfo-4.3.0-11.oe2203sp4.x86_64.rpm","libwebsockets-debugsource-4.3.0-11.oe2203sp4.x86_64.rpm","libwebsockets-devel-4.3.0-11.oe2203sp4.x86_64.rpm"],"aarch64":["libwebsockets-4.3.0-11.oe2203sp4.aarch64.rpm","libwebsockets-debuginfo-4.3.0-11.oe2203sp4.aarch64.rpm","libwebsockets-debugsource-4.3.0-11.oe2203sp4.aarch64.rpm","libwebsockets-devel-4.3.0-11.oe2203sp4.aarch64.rpm"],"noarch":["libwebsockets-help-4.3.0-11.oe2203sp4.noarch.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2026-4076.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}