CVE-2026-87550: Medium severity Google Chrome vulnerability
Chromium CVE-2026-87550: Improper encoding or escaping of output in CSS
Other sources
Improper encoding or escaping of output in CSS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to potentially bypass web origin policy 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 (and Chromium-based Microsoft Edge)to a version that resolves this vulnerability.Fixed in 153.0.8010.36
Event History
Frequently Asked Questions
Which Chrome installations are in scope?
Google Chrome versions earlier than 153.0.8010.36 are affected. Installations at or above that version are not included in the stated affected range.
What does an attacker need to exploit this issue?
The attacker needs to cause the target to process a crafted HTML page remotely. The issue could potentially be used to bypass the web origin policy.
How can I determine whether a system is affected?
Check the installed Google Chrome version. Systems running a version lower than 153.0.8010.36 fall within the affected range.