Origin Validation Error Affecting webkitgtk4-jsc package, versions <0:2.52.1-1.amzn2


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

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

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  • Snyk IDSNYK-AMZN2-WEBKITGTK4JSC-16341107
  • published2 May 2026
  • disclosed17 Mar 2026

Introduced: 17 Mar 2026

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

How to fix?

Upgrade Amazon-Linux:2 webkitgtk4-jsc to version 0:2.52.1-1.amzn2 or higher.
This issue was patched in ALAS2-2026-3270.

NVD Description

Note: Versions mentioned in the description apply only to the upstream webkitgtk4-jsc package and not the webkitgtk4-jsc package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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