EIP-2026-104487

PRE-CVE

WebKit - 'CachedFrameBase::restore' Universal Cross-Site Scripting

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-104487. PoCs published by Google Security Research.

AI-analyzed exploit summary This PoC exploits a race condition in FrameLoader::open where JavaScript handlers fire during frame destruction, leading to potential UXSS (Universal Cross-Site Scripting). The attack chain involves navigating frames, triggering unload events, and manipulating document states to bypass same-origin policy.

Description

WebKit - 'CachedFrameBase::restore' Universal Cross-Site Scripting

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · htmlwebappsmultiple
https://www.exploit-db.com/exploits/42106

This PoC exploits a race condition in FrameLoader::open where JavaScript handlers fire during frame destruction, leading to potential UXSS (Universal Cross-Site Scripting). The attack chain involves navigating frames, triggering unload events, and manipulating document states to bypass same-origin policy.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Complex
Reliability
Racy
Target: Chromium-based browsers (specific version not specified)
No auth needed
Prerequisites: User interaction (click) · Browser with vulnerable FrameLoader implementation
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026