What is the CVSS score of CVE-2026-91734?

CVE-2026-91734 has a CVSS 3.1 base score of 7.4 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a patch available for CVE-2026-91734?

Yes, a patch is available for CVE-2026-91734. Update the affected software to the latest version immediately.

Google CVE-2026-91734

EUVD-2026-79959 HIGH

Incorrect Authorization (CWE-863)

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

GHSA-p2gj-6m34-2678

Authentication Bypass RCE Google Microsoft Red Hat Suse

7.4

CVSS 3.1 · Vendor: google

View

Vulnerability Assessment

Weakness

CWE

CWE-863

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V8 - Authorization Authorization logic validation

MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

Incorrect authorization in Chrome's Core component on Windows (versions prior to 153.0.8010.47) lets a local attacker who can run a program on the machine break out of the browser sandbox and execute arbitrary code at the user's privilege level outside it. The flaw is rated High by the Chromium security team and carries CVSS 7.4 (AV:L/AC:H/PR:N/UI:N, C/I/A all High), reflecting a local-only but complete confidentiality, integrity and availability impact once the sandbox boundary is crossed. No public exploit code or CISA KEV listing was provided in the input, and Google has released a fixed stable-channel build, so this is best treated as a high-value chaining primitive rather than a currently mass-exploited issue.

Affected VersionsENISA

Chrome 153.0.8010.47 <153.0.8010.47

Affected Packages

euvd chrome fix: 153.0.8010.47

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (google) PRIMARY 7.4 HIGH

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

SUSE CRITICAL

Red Hat 8.8 HIGH

Primary rating from Vendor (google).

CVSS VectorVendor: google

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVSS changed

Sep 16, 2026 - 00:22 NVD

7.4 (HIGH)

CVE Published

Sep 15, 2026 - 21:16 cve.org

UNKNOWN (no severity yet)

CVE Published

Sep 15, 2026 - 21:16 cve.org

HIGH 7.4

DescriptionCVE.org

Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)

Threat Intelligence Overview

EPSS Score

0.1%

Top 99% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD 🇯🇵JVN

NVD

CVE.org

EPSS

Vulnrichment MSRC Vendor

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.