8.8 High

CVE-2026-83596 Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature

Description

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

CVSS 3.1 detail

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: None
Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Webkit 1.10	1.10.0 → latest	No fix stated
webkitgtk 1.10	1.10.0 → latest	No fix stated
Red Hat Enterprise Linux 9.6 Extended Update Support	Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 7 Extended Lifecycle Support	Versions not published

Show the 7 other branches

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	Versions not published
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 8.8 Telecommunications Update Service	Versions not published
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	Versions not published
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	Versions not published

References

RHSA-2026:69098 access.redhat.com
RHSA-2026:74084 access.redhat.com
RHSA-2026:89821 access.redhat.com
RHSA-2026:89822 access.redhat.com
RHSA-2026:91631 access.redhat.com
RHSA-2026:92216 access.redhat.com
RHSA-2026:92339 access.redhat.com
RHSA-2026:93435 access.redhat.com
RHSA-2026:95403 access.redhat.com
access.redhat.com access.redhat.com
bugs.webkit.org bugs.webkit.org
RHBZ#2526490 bugzilla.redhat.com

Timeline

Published August 31, 2026
Last modified November 5, 2026

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