{"id":"CVE-2026-105946","title":"Out-of-bounds read vulnerability in NTLM authentication handling impacts Qt","summary":"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)…","severity":"medium","cvss":5.3,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-125"],"vendor":"qt","product":"qt","affected":["qt >= 6.8.0 < 6.8.10","qt >= 6.9.0 < 6.11.2"],"published":"2026-10-27","updated":"2026-10-27","sourceUpdated":"2026-10-27T06:45:36.400Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105946","references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-105946:"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/745457"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/744448"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/745464"}],"tags":["cve.org"],"epss":0.00455,"epssPercentile":0.39292,"ingestedAt":"2026-10-27T16:11:59.227Z","slug":"CVE-2026-105946","body":"## Overview\n\nOut-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.\n\n## Affected\n\n- `qt >= 6.8.0 < 6.8.10`\n- `qt >= 6.9.0 < 6.11.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}