CVE-2026-83596

HIGH 8.8

Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.

CWE	CWE-120
Vendor	red hat
Product	red hat enterprise linux 6
Published	Aug 31, 2026

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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

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

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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.