CVE-2026-83596
Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature
CVSS Score
8.8
EPSS Score
0.3%
EPSS Percentile
20th
A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.
| CWE | CWE-120 |
| Vendor | webkit |
| Product | webkit |
| Published | Aug 31, 2026 |
| Last Updated | Sep 30, 2026 |
Stay Ahead of the Next One
Get instant alerts for webkit webkit
Be the first to know when new high vulnerabilities affecting webkit webkit are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
WebKit / WebKit
1.10.0 < *
WebKitGTK / WebKitGTK
1.10.0 < *
Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:69098 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:74084 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-83596 bugs.webkit.org: https://bugs.webkit.org/show_bug.cgi?id=322969 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2526490
Credits
Red Hat would like to thank Google Big Sleep for reporting this issue.