PatchSiren cyber security CVE debrief

CVE-2026-11658 Google CVE debrief

CVE-2026-11658 is a High-severity vulnerability in Google Chrome prior to version 149.0.7827.103. The issue involves insufficient validation of untrusted input in Extensions, allowing a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page.

Vendor: Google
Product: Chrome
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-06-10
Advisory published: 2026-06-09
Advisory updated: 2026-06-10

Who should care

Users of Google Chrome prior to version 149.0.7827.103

Technical summary

The vulnerability, with a CVSS score of 6.5 (Medium severity), was published on 2026-06-09T00:16:48.810Z and modified on 2026-06-10T18:30:47.863Z. It is tracked under CWE-20 and CWE-noinfo.

Defensive priority

High

Recommended defensive actions

Update Google Chrome to version 149.0.7827.103 or later.

Evidence notes

Evidence from the NVD and Chromium security team indicates that this vulnerability was exploited in the wild.

Sources and references

Verified primary and authoritative sources

CVE-2026-11658 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-11658

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-11658 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11658

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Mitigation or vendor reference
Unverified legacy reference

URL: https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html

[email protected] - Release Notes, Vendor Advisory
Source reference
Unverified legacy reference

URL: https://issues.chromium.org/issues/513564337

[email protected] - Permissions Required

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.