{"id":"CVE-2026-63559","aliases":["DEBIAN-CVE-2026-63559","EUVD-2026-51332","GHSA-6c97-xqf2-q99q","UBUNTU-CVE-2026-63559"],"status":"published","title":"o6 Automation open62541 Integer Overflow or Wraparound","description":"An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to read \nout-of-bounds heap memory, potentially disclosing sensitive information.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00697,"percentile":0.53479,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-190"],"published":"2026-07-30T21:47:21Z","modified":"2026-10-28T02:30:32Z","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"]}],"products":[{"vendor":"o6 automation","product":"open62541"},{"vendor":"o6 automation gmbh","product":"open62541"}],"references":[{"url":"https://www.o6-automation.com/contact","tags":["web"]},{"url":"https://github.com/open62541/open62541/pull/8235/commits/b666d35769ce63998442e4d0810a3fb10b50179f","tags":["web"]},{"url":"https://github.com/open62541/open62541/pull/8236/commits/06b99fef667c8ec5bdf0605b4f00c84fcc1d3a60","tags":["web"]},{"url":"https://github.com/open62541/open62541/pull/8237/commits/1b71d9c5d9c4d02d4729b8903a52e9f530bf804e","tags":["web"]},{"url":"https://github.com/open62541/open62541/pull/8238/commits/afab4107bfd161da9ce8bb30ed77f3968c9c97df","tags":["web"]},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-211-08","tags":["advisory"]},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-211-08.json","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63559","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-6c97-xqf2-q99q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63559.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-63559","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-63559","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63559","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-63559","title":"o6 Automation open62541 Integer Overflow or Wraparound","description":"An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to read \nout-of-bounds heap memory, potentially disclosing sensitive information.","status":"published","published":"2026-07-30T21:47:21.231Z","modified":"2026-08-25T14:22:58.35Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:19:55.914391Z"}],"euvd":[{"id":"EUVD-2026-51332","description":"An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to read \nout-of-bounds heap memory, potentially disclosing sensitive 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information.","status":"published","published":"2026-07-30T22:16:55.717Z","modified":"2026-10-23T22:10:00.16Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:33.955581Z"}],"osv":[{"id":"CVE-2026-63559","title":"o6 Automation open62541 Integer Overflow or Wraparound","description":"An integer overflow in the UA_Variant arrayDimensions product \ncomputation in open62541 may allow a remote attacker to read \nout-of-bounds heap memory, potentially disclosing sensitive information.","status":"published","published":"2026-07-30T21:47:21.231Z","modified":"2026-10-28T02:30:32.873041985Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:45:13.306117Z"},{"id":"DEBIAN-CVE-2026-63559","description":"An integer overflow in the UA_Variant arrayDimensions product  computation in open62541 may allow a remote attacker to read  out-of-bounds heap memory, potentially disclosing sensitive information.","status":"published","published":"2026-07-30T22:16:55.717Z","modified":"2026-10-24T09:47:30.747251438Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"UBUNTU-CVE-2026-63559","description":"An integer 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