{"id":"UBUNTU-CVE-2026-18784","details":"A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.","modified":"2026-08-06T03:08:40.404637264Z","published":"2026-08-04T17:16:00Z","upstream":["CVE-2026-18784"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-18784"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-18784"},{"type":"REPORT","url":"https://github.com/open62541/open62541/issues/8139"},{"type":"REPORT","url":"https://github.com/gff-cw/information/issues/11"},{"type":"REPORT","url":"https://vuldb.com/cve/CVE-2026-18784"},{"type":"REPORT","url":"https://vuldb.com/submit/857012"},{"type":"REPORT","url":"https://vuldb.com/vuln/385786"},{"type":"REPORT","url":"https://vuldb.com/vuln/385786/cti"}],"affected":[{"package":{"name":"open62541","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/open62541?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.11.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopen62541-1.4","binary_version":"1.4.11.1-1build1"},{"binary_name":"libopen62541-1.4-tools","binary_version":"1.4.11.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-18784.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}