EIP-2026-103711

PRE-CVE

WebKit - UXSS Using JavaScript: URI and Synchronous Page Loads

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103711. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit leverages a race condition in WebKit's DocumentWriter to inject attacker-controlled content into a cross-origin document by reusing the DOMWindow object during a javascript: URI navigation. The PoC demonstrates how event handlers remain active, allowing synchronous page loads to manipulate the victim document.

Description

WebKit - UXSS Using JavaScript: URI and Synchronous Page Loads

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdosmultiple
https://www.exploit-db.com/exploits/47450

This exploit leverages a race condition in WebKit's DocumentWriter to inject attacker-controlled content into a cross-origin document by reusing the DOMWindow object during a javascript: URI navigation. The PoC demonstrates how event handlers remain active, allowing synchronous page loads to manipulate the victim document.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Complex
Reliability
Racy
Target: WebKit revision 246194, Safari 12.1.1 (14607.2.6.1.1)
No auth needed
Prerequisites: Victim page with an active parser (e.g., via document.write) · Ability to control iframe navigation and event handlers
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026