{"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) \u2014 draft only, requires human validation before submission"}}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*", "cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["qtbase"], "product": "qt", "vendor": "qt", "versions": [{"lessThan": "6.8.0", "status": "unknown", "version": "0", "versionType": "python"}, {"lessThan": "6.8.10", "status": "affected", "version": "6.8.0", "versionType": "python"}, {"lessThan": "6.11.2", "status": "affected", "version": "6.9.0", "versionType": "python"}]}], "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3"}], "cveTags": [], "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."}], "id": "CVE-2026-105946", "lastModified": "2026-10-27T07:16:31.860", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "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/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "type": "Secondary"}]}, "published": "2026-10-27T07:16:31.860", "references": [{"source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "url": "https://codereview.qt-project.org/c/qt/qtbase/+/744448"}, {"source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "url": "https://codereview.qt-project.org/c/qt/qtbase/+/745457"}, {"source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "url": "https://codereview.qt-project.org/c/qt/qtbase/+/745464"}, {"source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "url": "https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-105946:"}], "sourceIdentifier": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "type": "Secondary"}]}

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