CVE-2026-9963: Uninitialized Use in Google Chrome
Uninitialized Use in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
AI Analysis
Technical Summary
This vulnerability arises from uninitialized use in Google Chrome on iOS versions before 148.0.7778.216. An attacker can exploit this by tricking a user into performing certain UI gestures on a maliciously crafted HTML page, leading to arbitrary code execution within the browser's sandbox environment. The issue was assigned CVE-2026-9963 and is classified with high severity by Chromium security. No detailed technical exploit methods or CVSS score are available in the provided information.
Potential Impact
Successful exploitation could allow remote code execution within the sandboxed environment of Chrome on iOS, potentially compromising the security of the browser session. However, the impact is limited to the sandbox and requires user interaction via specific UI gestures. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html for current remediation guidance. Users should update Google Chrome on iOS to version 148.0.7778.216 or later once the update is confirmed to address this vulnerability. Until then, caution should be exercised when interacting with untrusted web content requiring unusual UI gestures.
CVE-2026-9963: Uninitialized Use in Google Chrome
Description
Uninitialized Use in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker who convinced a user to engage in specific UI gestures to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from uninitialized use in Google Chrome on iOS versions before 148.0.7778.216. An attacker can exploit this by tricking a user into performing certain UI gestures on a maliciously crafted HTML page, leading to arbitrary code execution within the browser's sandbox environment. The issue was assigned CVE-2026-9963 and is classified with high severity by Chromium security. No detailed technical exploit methods or CVSS score are available in the provided information.
Potential Impact
Successful exploitation could allow remote code execution within the sandboxed environment of Chrome on iOS, potentially compromising the security of the browser session. However, the impact is limited to the sandbox and requires user interaction via specific UI gestures. There are no known exploits in the wild as of the publication date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html for current remediation guidance. Users should update Google Chrome on iOS to version 148.0.7778.216 or later once the update is confirmed to address this vulnerability. Until then, caution should be exercised when interacting with untrusted web content requiring unusual UI gestures.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-05-28T17:25:02.357Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html","vendor":"Google"}]
Threat ID: 6a18c676e29bf47b503b632a
Added to database: 5/28/2026, 10:49:26 PM
Last enriched: 5/28/2026, 11:19:42 PM
Last updated: 5/29/2026, 2:19:50 PM
Views: 7
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.