{"id":"CVE-2026-67856","aliases":["DEBIAN-CVE-2026-67856","EUVD-2026-52968","GHSA-xph2-98f4-p64h","UBUNTU-CVE-2026-67856"],"status":"published","title":"An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service...","description":"An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests","severity":{"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","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00759,"percentile":0.55562,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2026-08-04T00:00:00Z","modified":"2026-10-28T02:30:50Z","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/8092","tags":["exploit","report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c","tags":["web","report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c","tags":["web","report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h","tags":["web","report"]},{"url":"https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c","tags":["web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67856","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-xph2-98f4-p64h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67856.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-67856","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-67856","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67856","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-67856","description":"An 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requests","status":"published","published":"2026-08-04T00:00:00Z","modified":"2026-10-28T02:30:50.277583962Z","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":"2026-11-02T15:45:14.46177Z"},{"id":"DEBIAN-CVE-2026-67856","description":"An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests","status":"published","published":"2026-08-04T22:17:15.85Z","modified":"2026-10-01T03:03:38.948124338Z","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-2026-67856","description":"An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests","status":"published","published":"2026-08-04T22:17:00Z","modified":"2026-10-17T13:00:40.808089966Z","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"}]}}