{"id":"CVE-2026-67855","aliases":["DEBIAN-CVE-2026-67855","EUVD-2026-52969","GHSA-cgjp-m25q-4wp8","UBUNTU-CVE-2026-67855"],"status":"published","title":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow...","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","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":0.00508,"percentile":0.43704,"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":"2026-10-17T13:00:40Z","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","tags":["report"]},{"url":"https://github.com/open62541/open62541/issues/8093","tags":["exploit","report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h","tags":["report"]},{"url":"https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67855"},{"url":"https://github.com/advisories/GHSA-cgjp-m25q-4wp8"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-67855","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-67855","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-67855","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-67855","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-04T00:00:00Z","modified":"2026-08-05T18:54:07.071Z","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","assessor":"adp"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-52969","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-04T00:00:00Z","modified":"2026-08-05T18:54:07Z","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":"2026-11-02T18:02:09.520152Z"}],"ghsa":[{"id":"GHSA-cgjp-m25q-4wp8","title":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow...","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-05T00:30:38Z","modified":"2026-08-05T21:31:36Z","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"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:10:07.926015Z"}],"nvd":[{"id":"CVE-2026-67855","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-04T22:17:15.733Z","modified":"2026-08-31T19:33:11.197Z","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","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:12:34.643497Z"}],"osv":[{"id":"DEBIAN-CVE-2026-67855","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-04T22:17:15.733Z","modified":"2026-10-01T03:03:48.26341388Z","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-2026-67855","description":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","status":"published","published":"2026-08-04T22:17:00Z","modified":"2026-10-17T13:00:40.416356368Z","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"}]}}