{"id":"CVE-2026-76151","title":"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 (applicati…","summary":"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 (applicati…","severity":"medium","cvss":4.6,"cvssVector":"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","cwe":["CWE-125","CWE-197"],"vendor":"qt","product":"qt","affected":["qt >= 6.0.0 < 6.8.9","qt >= 6.9.0 < 6.11.2"],"published":"2026-09-16","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:21:34.307","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76151","references":[{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/752129","label":"a59d8014-47c4-4630-ab43-e1b13cbe58e3"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76151.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-76151"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535100"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-76151"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76151"},{"url":"https://access.redhat.com/errata/RHSA-2026:82734"},{"url":"https://access.redhat.com/errata/RHSA-2026:82382"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00671,"epssPercentile":0.51812,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-16T13:19:18.218493Z"},"cvssSource":"cna","ingestedAt":"2026-09-16T10:53:53.922Z","scores":{"cna":4.6,"vendor":7.5},"patched":["hardened_images"],"slug":"CVE-2026-76151","body":"## Overview\n\nOut-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Hardened Images · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-76151.json)\n- **RHSA-2026:82734** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82734)\n- **RHSA-2026:82382** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82382)","depth":"sunlit","depthScore":25,"depthScoreParts":{"impact":25.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}