{"id":"CVE-2026-100140","kind":"vulnerability","aliases":["CVE-2026-100140"],"related":[],"title":"Qt: integer overflow in XML parsing may crash or misbehave","description":"An integer overflow vulnerability in the Qt XML parsing (Qt5Compat / QXmlSimpleReader) functionality of Qt.","summary":"Qt's XML parsing code in the Qt5Compat module (QXmlSimpleReader) has an integer overflow. The sources do not say what an attacker can get beyond a low CVSS score of 1.9.","severity":"low","cvss":1.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["c++","package","qt"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-02T12:16:58+00:00","first_seen_at":"2026-11-02T12:23:05+00:00","triaged_at":"2026-11-02T12:24:12+00:00","updated_at":"2026-11-02T12:24:12+00:00","category":"package","confidence":0.3,"triage":{"at":"2026-11-02T12:24:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"unknown","title":"Qt: integer overflow in XML parsing may crash or misbehave","impact":"low","summary":"Qt's XML parsing code in the Qt5Compat module (QXmlSimpleReader) has an integer overflow. The sources do not say what an attacker can get beyond a low CVSS score of 1.9.","audience":"developers","category":"package","nicknames":[],"who_cares":["qt","c++"],"confidence":0.3,"fix_status":"unknown","needs_auth":"unknown","worst_case":"unknown; sources give only a low CVSS score","analyst_note":"Check the NVD entry and the Qt project security advisories for affected and fixed versions and the trigger conditions.","how_to_check":"- unknown","plain_action":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Applications built with Qt that parse XML through the Qt5Compat QXmlSimpleReader class. The sources do not say which Qt versions or configurations are affected, or what triggers the overflow.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000611,"input_tokens":4084,"output_tokens":405,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-100140':13A,16A '-2026':12A,15A '1.9':50B 'attack':41B 'beyond':44B 'c':17B 'code':24B 'crash':8A 'cve':11A,14A 'cvss':47B 'function':62C 'get':43B 'integ':2A,32B,52C 'low':46B 'may':7A 'misbehav':10A 'modul':28B 'overflow':3A,33B,53C 'packag':18B 'pars':6A,23B,59C 'qt':1A,19B,20B,57C,64C 'qt5compat':27B,60C 'qxmlsimpleread':29B,61C 'say':38B 'score':48B 'sourc':35B 'vulner':54C 'xml':5A,22B,58C","nicknames":[],"mitigations":[],"who_affected":"Applications built with Qt that parse XML through the Qt5Compat QXmlSimpleReader class. The sources do not say which Qt versions or configurations are affected, or what triggers the overflow.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["c","low","package","qt"],"first_public_at":"2026-11-02T12:16:58+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/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:U/V:X/RE:X/U:Green","cvss_by":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-100140","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100140","severity":null,"published_at":"2026-11-02T12:16:58+00:00","modified_at":"2026-11-02T12:16:58+00:00","first_seen_at":"2026-11-02T12:23:05+00:00","fetched_at":"2026-11-02T12:23:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}