CVE-2026-11658: High Insufficient validation of untrusted input in Extensions
Chromium: CVE-2026-11657 Use after free in Payments
Other sources
Insufficient validation of untrusted input in Extensions in Google Chrome prior to 149.0.7827.103 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
— 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
Credit
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 149.0.4022.62
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-76033
- CVE-2026-12462
- CVE-2026-12025
- CVE-2026-76018
- CVE-2026-12016
- CVE-2026-76023
- CVE-2026-11701
- CVE-2026-11664
- CVE-2026-76022
- CVE-2026-76045
- CVE-2026-19558
- CVE-2026-13027
- CVE-2026-17693
- CVE-2026-15777
- CVE-2026-19144
- CVE-2026-11666
- CVE-2026-10949
- CVE-2026-11652
- CVE-2026-19559
- CVE-2026-10938
- CVE-2026-9124
- CVE-2026-9951
- CVE-2026-7991
- CVE-2026-11681
- CVE-2026-19145
- CVE-2026-13034
- CVE-2026-19165
Frequently Asked Questions
What is the severity of CVE-2026-11658?
CVE-2026-11658 has a medium severity rated at 6.5 according to the CVSS 3.1 metrics.
How do I fix CVE-2026-11658?
The recommended fix for CVE-2026-11658 is to update Google Chrome to version 149.0.7827.103 or later.
What impact does CVE-2026-11658 have on Google Chrome?
CVE-2026-11658 allows a remote attacker to bypass site isolation through insufficient validation of untrusted input in Extensions.
Can CVE-2026-11658 affect users on older versions of Google Chrome?
Yes, users on versions of Google Chrome prior to 149.0.7827.103 are at risk of exploitation from CVE-2026-11658.
What types of attacks are related to CVE-2026-11658?
CVE-2026-11658 is related to attacks that exploit untrusted input to compromise the renderer process within Google Chrome.