{"id":"CVE-2026-116500","aliases":["EUVD-2026-119684"],"status":"published","title":"Unbound Recursion in QPY deserialization can lead to denial of service","description":"IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.","severity":{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00162,"percentile":0.05491,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2026-11-08T17:04:53Z","modified":"2026-11-08T17:04:53Z","products":[{"vendor":"ibm","product":"qiskit sdk"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7295235","tags":["vendor-advisory","patch"]}],"sources":{"cve":[{"id":"CVE-2026-116500","title":"Unbound Recursion in QPY deserialization can lead to denial of service","description":"IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.","status":"published","published":"2026-11-08T17:04:53.713Z","modified":"2026-11-12T20:07:54.796Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-502"],"updated_at":"2026-11-08T18:44:07.937542Z"}],"euvd":[{"id":"EUVD-2026-119684","description":"IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.","status":"published","published":"2026-11-08T17:04:53Z","modified":"2026-11-12T20:07:54Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-08T18:13:35.788806Z"}],"nvd":[{"id":"CVE-2026-116500","description":"IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.","status":"published","published":"2026-11-08T17:16:37.007Z","modified":"2026-11-12T20:18:16.96Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-502"],"updated_at":"2026-11-12T21:32:42.996848Z"}]}}