{"id":"CVE-2023-51714","title":"An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2","summary":"An issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-190"],"vendor":"qt","product":"qt","affected":["debian_linux = 10.0","qt >= 5.7, < 5.15.17","qt >= 6.0.0, < 6.2.11","qt >= 6.3.0, < 6.5.4","qt >= 6.6.0, < 6.6.2"],"patched":["qt 6.6.2"],"published":"2023-12-24","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:17:25.630","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-51714","references":[{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/524864","label":"cve@mitre.org"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/524865/3","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html","label":"cve@mitre.org"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/524864","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://codereview.qt-project.org/c/qt/qtbase/+/524865/3","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00027.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00978,"epssPercentile":0.61028,"ingestedAt":"2026-10-08T23:16:47.354Z","slug":"CVE-2023-51714","body":"## Overview\n\nAn issue was discovered in the HTTP2 implementation in Qt before 5.15.17, 6.x before 6.2.11, 6.3.x through 6.5.x before 6.5.4, and 6.6.x before 6.6.2. network/access/http2/hpacktable.cpp has an incorrect HPack integer overflow check.\n\n## Affected\n\n- `debian_linux = 10.0`\n- `qt >= 5.7, < 5.15.17`\n- `qt >= 6.0.0, < 6.2.11`\n- `qt >= 6.3.0, < 6.5.4`\n- `qt >= 6.6.0, < 6.6.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `qt 6.6.2`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}