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CVE-2026-11129 Google CVE debrief

CVE-2026-11129 is a Medium severity vulnerability in Google Chrome prior to 149.0.7827.53. This vulnerability is caused by an inappropriate implementation in Extensions, allowing a remote attacker to leak cross-origin data via a crafted HTML page. The CVSS score for this vulnerability is 6.5.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-06-08
Advisory published
2026-06-04
Advisory updated
2026-06-08

Who should care

Users of Google Chrome prior to version 149.0.7827.53 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability is caused by an inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.53. This allows a remote attacker to leak cross-origin data via a crafted HTML page.

Defensive priority

Medium

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.

Evidence notes

The CVE record and NVD detail can be found at [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-11129) and [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-11129).

Official resources

CVE-2026-11129 was published on [cvePublishedAt] and modified on [cveModifiedAt].