{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105946","assignerOrgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","state":"PUBLISHED","assignerShortName":"Qt","dateReserved":"2026-10-06T07:24:45.304Z","datePublished":"2026-10-27T06:45:36.400Z","dateUpdated":"2026-10-27T06:45:36.400Z"},"containers":{"cna":{"providerMetadata":{"orgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","shortName":"Qt","dateUpdated":"2026-10-27T06:45:36.400Z"},"title":"Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt","datePublic":"2026-06-19T13:56:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"affected":[{"vendor":"qt","product":"qt","modules":["qtbase"],"versions":[{"status":"unknown","version":"0","lessThan":"6.8.0","versionType":"python"},{"status":"affected","version":"6.8.0","lessThan":"6.8.10","versionType":"python"},{"status":"affected","version":"6.9.0","lessThan":"6.11.2","versionType":"python"}],"defaultStatus":"unaffected","cpes":["cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*"]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8.0","versionEndExcluding":"6.8.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.0","versionEndExcluding":"6.11.2"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8.0","versionEndExcluding":"6.8.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.0","versionEndExcluding":"6.11.2"}]}]}],"descriptions":[{"lang":"en","value":"Out-of-bounds read in the QAuthenticator NTLM authentication handling in the Qt Network module in Qt Group Qt allows remote attackers to obtain sensitive information (heap memory contents) or cause a denial of service (application crash) via a crafted NTLM challenge sent by a malicious server or proxy, when an application using QNetworkAccessManager or QTcpSocket authenticates with NTLM.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Out-of-bounds read in the <code>QAuthenticator</code> NTLM authentication handling in the Qt Network module in Qt Group Qt allows remote attackers to obtain sensitive information (heap memory contents) or cause a denial of service (application crash) via a crafted NTLM challenge sent by a malicious server or proxy, when an application using <code>QNetworkAccessManager</code> or <code>QTcpSocket</code> authenticates with NTLM.</p>"}]}],"references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-105946:","tags":["vendor-advisory"]},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/745457","tags":["patch"]},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/744448","tags":["patch"]},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/745464","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"}}],"source":{"advisory":"QVM-279","discovery":"INTERNAL"},"x_generator":{"engine":"Claude AI (Opus 5.5) — draft only, requires human validation before submission"}}}}