What is the CVSS score of CVE-2026-3545?

CVE-2026-3545 has a CVSS 3.1 base score of 9.6 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-3545?

Within 24 hours: Issue urgent communication to all users directing immediate Chrome browser updates to version 145.0.7632.159 or later; block older Chrome versions from accessing critical systems if technically feasible. Within 7 days: Verify patch deployment across 95% of Chrome instances through endpoint management tools and conduct spot audits. Within 30 days: Complete 100% deployment verification, conduct security awareness training on the incident, and review browser update policies to reduce future patch cycles.

Chrome CVE-2026-3545

CRITICAL

Improper Input Validation (CWE-20)

2026-03-04 chrome-cve-admin@google.com

Chrome Google Red Hat Suse

9.6

CVSS 3.1 · NVD

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious HTML page
Delivery

User visits page in Chrome browser
Exploit

Navigation validation bypassed
Execution

Sandbox escape executed
Impact

Arbitrary code runs outside sandbox

Vulnerability Assessment

Weakness	CWE CWE-20 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V2 - Validation and Business Logic Input validation, allowlisting
Exploitation Conditions	User must visit attacker-controlled or compromised website with Chrome browser prior to version 145.0.7632.159. No authentication required. Vulnerable to default Chrome installations with sandbox enabled.
Impact	CVSS 9.6.
Exploit ScenarioDerived	Exploit navigation validation for sandbox escape.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Sandbox escape via navigation validation in Chrome before 145.0.7632.159. Patch available.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:05 CVSS 9.6

Sandbox escape in Chrome navigation.

RemediationAI

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Technical ContextAI · show details

CWE-20 in Navigation component.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.6 CRITICAL

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

SUSE CRITICAL

Red Hat 8.8 HIGH

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 05, 2026 - 21:57 nvd

Patch available

CVE Published

Mar 04, 2026 - 20:16 nvd

CRITICAL 9.6

DescriptionCVE.org

Insufficient data validation in Navigation in Google Chrome prior to 145.0.7632.159 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Executive ViewAI

Why It Matters

A critical sandbox escape vulnerability in Google Chrome (CVE-2026-3545, CVSS 9.6) allows attackers to execute arbitrary code on users' systems through malicious websites. This affects all Chrome users across the organization and poses a significant risk to data confidentiality and system integrity if exploited, though current threat activity is minimal (0.1% EPSS).

Business Impact: High

Compensating Controls

Apply vendor patch. Interim mitigations if patching delayed: restrict Chrome usage on high-risk systems, disable JavaScript in Chrome for non-essential users, implement network-based threat prevention (IDS/IPS) to detect exploitation patterns, apply web filtering to block known malicious domains, and mandate user awareness training on suspicious website indicators.

Threat Intelligence Overview

EPSS Score

0.1%

Top 70% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS 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 CRITICAL

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

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.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +48

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Affected Products (CPE)CVE.org

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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Vendor StatusVendor

SUSE

Severity: Critical

Product	Status
SUSE Package Hub 15 SP6	Fixed
openSUSE Leap 15.6	Fixed
openSUSE Leap 16.0	Fixed
openSUSE Tumbleweed	Fixed
SUSE Package Hub 15 SP6	Fixed

References

Advisories & patches

ADVISORY http://chromereleases.googleblog.com/2026/03/long-term-support-channel-update-for.html ADVISORY http://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop.html ADVISORY https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop.html REF https://issues.chromium.org/issues/487383169

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