What is the CVSS score of CVE-2026-91731?

CVE-2026-91731 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-91731?

Yes, a patch is available for CVE-2026-91731. Update the affected software to the latest version immediately.

Google CVE-2026-91731

EUVD-2026-79966 HIGH

Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)

2026-09-15 chrome-cve-admin@google.com

GHSA-hj7m-c4qj-45q5

RCE Google Memory Corruption

8.8

CVSS 3.1 · Vendor: google

Severity by source

Vendor (google) PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from Vendor (google) · only source for this CVE.

CVSS VectorVendor: google

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Sep 16, 2026 - 00:23 vuln.today

CVSS changed

Sep 16, 2026 - 00:22 NVD

8.8 (HIGH)

CVE Published

Sep 15, 2026 - 21:16 cve.org

UNKNOWN (no severity yet)

CVE Published

Sep 15, 2026 - 21:16 cve.org

HIGH 8.8

DescriptionCVE.org

Type confusion in Compositing in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

AnalysisAI

Remote code execution inside the renderer sandbox affects Google Chrome desktop builds prior to 153.0.8010.47, caused by a type confusion flaw in the browser's compositing pipeline (CWE-843) that is reachable from a crafted HTML page. An attacker needs only to convince a user to load the page: the CVSS 3.1 vector is 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), so no credentials or privileges are required, but user interaction is mandatory. …