{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76151","assignerOrgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","state":"PUBLISHED","assignerShortName":"Qt","dateReserved":"2026-08-19T06:21:50.153Z","datePublished":"2026-09-16T09:58:00.053Z","dateUpdated":"2026-09-16T13:19:40.054Z"},"containers":{"cna":{"providerMetadata":{"orgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","shortName":"Qt","dateUpdated":"2026-09-16T09:58:00.053Z"},"title":"Out-of-bounds read (buffer over-read) vulnerability in HTTP Cache-Control response header parsing impacts Qt Framework (QtNetwork module)","datePublic":"2026-07-14T20:43:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-197","description":"CWE-197 Numeric Truncation Error","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"affected":[{"vendor":"qt","product":"qt","repo":"https://code.qt.io/cgit/qt/qtbase.git","modules":["qtbase"],"versions":[{"status":"affected","version":"6.0.0","lessThan":"6.8.9","versionType":"python"},{"status":"affected","version":"6.9.0","lessThan":"6.11.2","versionType":"python"}],"defaultStatus":"unaffected"}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.8.9"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.0","versionEndExcluding":"6.11.2"}]}]}],"descriptions":[{"lang":"en","value":"Out-of-bounds read (buffer over-read) in the HTTP Cache-Control response header parsing in the QtNetwork module in Qt Group Qt 6.0.0 through 6.8.8, and 6.9.0 through 6.11.1, allows remote attackers to cause a denial of service (application crash) via an excessively large Cache-Control header value returned by an untrusted or compromised HTTP server to an application using QNetworkAccessManager. Only the client side of the connection is affected and 32-bit builds are not affected; the out-of-bounds access is read-only, with no information disclosure and no code execution.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Out-of-bounds read (buffer over-read) in the HTTP Cache-Control response header parsing in the QtNetwork module in Qt Group Qt 6.0.0 through 6.8.8, and 6.9.0 through 6.11.1, allows remote attackers to cause a denial of service (application crash) via an excessively large Cache-Control header value returned by an untrusted or compromised HTTP server to an application using QNetworkAccessManager. Only the client side of the connection is affected and 32-bit builds are not affected; the out-of-bounds access is read-only, with no information disclosure and no code execution.</p>"}]}],"references":[{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/752129","name":"QtNetwork: port nextNonWhitespace() and all its users to qsizetype (dev)","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","Safety":"NOT_DEFINED","Automatable":"NO","Recovery":"AUTOMATIC","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":4.6,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:A"}}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Claude AI (Opus 5) — draft only, requires human validation before submission"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T13:19:18.218493Z","id":"CVE-2026-76151","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-16T13:19:40.054Z"}}]}}