Origin Validation Error Affecting webkit2gtk3-jsc package, versions <0:2.52.3-1.el9_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-RHEL9-WEBKIT2GTK3JSC-16699196
  • published15 May 2026
  • disclosed28 Mar 2026

Introduced: 28 Mar 2026

CVE-2026-20643  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade RHEL:9 webkit2gtk3-jsc to version 0:2.52.3-1.el9_2 or higher.
This issue was patched in RHSA-2026:16695.

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 RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

A cross-origin issue in the Navigation API was addressed with improved input validation. This issue is fixed in Background Security Improvements for iOS, iPadOS, and macOS, Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may bypass Same Origin Policy.

CVSS Base Scores

version 3.1