CVE-2026-106263: Improper input validation in Google Chrome
Description
An improper input validation vulnerability in the SignIn component of Google Chrome prior to version 155.0.8059.39 allows a remote attacker to bypass system access restrictions by leveraging social engineering and a crafted Chrome extension. The vulnerability is rated with medium severity by Chromium security. A fix is available in Chrome version 155.0.8059.39.
Affected software
Chrome
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-106263 is an input validation flaw in the SignIn functionality of Google Chrome before version 155.0.8059.39. This vulnerability enables a remote attacker, through social engineering and a maliciously crafted Chrome extension, to bypass system access restrictions. The issue was addressed by Google in the stable channel update 155.0.8059.39.
Potential Impact
Successful exploitation could allow an attacker to circumvent system access controls, potentially leading to unauthorized actions within the Chrome environment. However, exploitation requires social engineering and user interaction to install a crafted extension. The severity is assessed as medium by Chromium security.
Mitigation Recommendations
Users and administrators should update Google Chrome to version 155.0.8059.39 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in this version. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-10-06T16:33:50.459Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_086471744.html","vendor":"Google"}]
Threat ID: 6ac546432cdf04f656d49d81
Added to database: 10/06/2026, 19:04:35 UTC
Last enriched: 10/06/2026, 22:04:08 UTC
Last updated: 10/06/2026, 22:04:08 UTC
Views: 1
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.