{"id":"CVE-2026-78376","title":"A flaw was found in WebKitGTK","summary":"A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"WebKit","product":"webkit","affected":["webkit >= 2.21.1 < *","webkitgtk >= 2.21.1 < *","webkit2gtk3 (all versions)","webkitgtk","webkitgtk3","webkitgtk4 (all versions)","webkit2gtk3 (all versions)"],"patched":["enterprise_linux_appstream_v_9"],"published":"2026-08-24","updated":"2026-09-22","sourceUpdated":"2026-09-22T15:17:15.333","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78376","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69098","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-78376","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521858","label":"secalert@redhat.com"},{"url":"https://github.com/WebKit/WebKit/pull/72142","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78376.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-78376"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78376"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-24T00:00:00+00:00"},"epss":0.00285,"epssPercentile":0.21329,"ingestedAt":"2026-09-21T16:49:07.870Z","slug":"CVE-2026-78376","body":"## Overview\n\nA flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:69098** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69098)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78376.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}