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CVE-2026-11308 Google CVE debrief

CVE-2026-11308 is a MEDIUM severity vulnerability in Google Chrome prior to 149.0.7827.53. The vulnerability is caused by an inappropriate implementation in Extensions, which allows an attacker who convinced a user to install a malicious extension to perform privilege escalation via a crafted Chrome Extension. The CVSS score for this vulnerability is 6.3.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-08
Advisory published
2026-06-05
Advisory updated
2026-06-08

Who should care

Users of Google Chrome prior to version 149.0.7827.53, as well as administrators and security teams responsible for managing Chrome installations.

Technical summary

The vulnerability is caused by an inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.53. This allows an attacker who convinced a user to install a malicious extension to perform privilege escalation via a crafted Chrome Extension.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.
  • Be cautious when installing extensions from untrusted sources.
  • Monitor for suspicious activity in Chrome extension installations.

Evidence notes

The CVE was published on 2026-06-05T00:17:08.870Z and modified on 2026-06-08T17:43:16.213Z. The vulnerability has a CVSS score of 6.3 and is classified as MEDIUM severity.

Official resources

CVE-2026-11308 was published on 2026-06-05T00:17:08.870Z and modified on 2026-06-08T17:43:16.213Z.