CVE-2026-87599: Input Validation
Chromium CVE-2026-87599: Improper input validation in Interstitials
Other sources
Improper input validation in Interstitials in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 153.0.4234.32 - Upgrade
Upgrade
Chromium/Google Chrome (as used by Edge)to a version that resolves this vulnerability.Fixed in 153.0.8010.36 - Compensating control
If you cannot immediately update, mitigate by restricting browsing/ingestion of untrusted HTML content in Interstitials (e.g., limit access to untrusted sites) until Chromium is updated to 153.0.8010.36 or later.
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The attacker needs to persuade a user to load a crafted HTML page. The issue can then be used to spoof UI elements in Chrome interstitials.
Which Chrome versions need to be updated?
Google Chrome versions prior to 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the affected version range described.