Use After Free Affecting webkit2gtk3-jsc package, versions <0:2.54.0-1.el8_10


Severity

Recommended
critical

Based on CentOS security rating.

Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-CENTOS8-WEBKIT2GTK3JSC-18004340
  • published17 Jul 2026
  • disclosed10 Jul 2026

Introduced: 10 Jul 2026

CVE-2026-43740  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Centos:8 webkit2gtk3-jsc to version 0:2.54.0-1.el8_10 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream webkit2gtk3-jsc package and not the webkit2gtk3-jsc package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may result in the disclosure of process memory.

CVSS Base Scores

version 3.1