{"id":"CVE-2026-67857","aliases":["DEBIAN-CVE-2026-67857","EUVD-2026-52967","GHSA-2mh5-cmr8-pwvp","UBUNTU-CVE-2026-67857"],"status":"published","title":"open62541 1.5.5 contains an out-of-bounds read in the client-side function...","description":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0063,"percentile":0.50519,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-08-04T00:00:00Z","modified":"2026-10-17T13:00:39Z","affected":[{"source":"osv","ecosystem":"Debian:13","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.18-1"]},{"source":"osv","ecosystem":"Debian:14","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.18-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1build1","1.4.18-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"open62541","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.11.1-1build1"]}],"references":[{"url":"https://github.com/open62541/open62541/issues/8104","tags":["exploit","report"]},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/src/client/ua_client_connect.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/v1.5.5/examples/client_connect_loop.c","tags":["report"]},{"url":"https://github.com/gff-cw/information/issues/9","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67857"},{"url":"https://github.com/advisories/GHSA-2mh5-cmr8-pwvp"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-67857","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-67857","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67857","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-67857","description":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","status":"published","published":"2026-08-04T00:00:00Z","modified":"2026-08-05T14:31:49.82Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-52967","description":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","status":"published","published":"2026-08-04T00:00:00Z","modified":"2026-08-05T14:31:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N","level":"high"}],"updated_at":"2026-11-02T18:02:10.319044Z"}],"ghsa":[{"id":"GHSA-2mh5-cmr8-pwvp","title":"open62541 1.5.5 contains an out-of-bounds read in the client-side function...","description":"open62541 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function responseReadNamespacesArray() in src/client/ua_client_connect.c.","status":"published","published":"2026-08-04T22:17:15.957Z","modified":"2026-10-01T03:03:48.303428846Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:01.68444Z"},{"id":"UBUNTU-CVE-2026-67857","description":"open62541 1.5.5 contains an out-of-bounds read in the client-side function responseReadNamespacesArray() in src/client/ua_client_connect.c.","status":"published","published":"2026-08-04T22:17:00Z","modified":"2026-10-17T13:00:39.573471042Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:53.710209Z"}]}}