What is the CVSS score of CVE-2026-87608?

CVE-2026-87608 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Is there a patch available for CVE-2026-87608?

Yes, a patch is available for CVE-2026-87608. Update the affected software to the latest version immediately.

Google CVE-2026-87608

EUVD-2026-74474 HIGH

Improper Certificate Validation (CWE-295)

2026-09-09 Chrome

GHSA-vmwr-6hc4-r546

Authentication Bypass Google Suse

7.5

CVSS 3.1 · Vendor: Chrome

View

Vulnerability Assessment

Weakness

CWE

CWE-295

OWASP Top 10:2025

A07:2025 - Authentication Failures

ASVS 5.0

V12 - Secure Communication Certificate validation

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 15, 2026

Improper certificate validation in Chrome's Federated Credential Management (FedCM) component — fixed in Chrome 153.0.8010.36 — lets a remote attacker who controls crafted network traffic, combined with social engineering of the victim, bypass web origin policy and expose cross-origin identity data. The flaw is a confidentiality-only issue (no integrity or availability impact) and Chrome rates it security severity Low, despite a 7.5 CVSS base score; EPSS is only 0.15% (4th percentile), it is not in CISA KEV, and no public exploit code has been identified at time of analysis. Vendor-released patch: 153.0.8010.36.

Affected VersionsENISA

Chrome 153.0.8010.36 <153.0.8010.36

Affected Packages

euvd chrome fix: 153.0.8010.36

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Chrome) PRIMARY 7.5 HIGH

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

SUSE CRITICAL

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVSS changed

Sep 14, 2026 - 13:22 NVD

7.5 (HIGH)

Patch available

Sep 09, 2026 - 01:03 EUVD

CVE Published

Sep 09, 2026 - 00:10 cve.org

HIGH 7.5

CVE Published

Sep 09, 2026 - 00:10 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Improper certificate validation in FedCM in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via crafted network traffic. (Chromium security severity: Low)

Threat Intelligence Overview

EPSS Score

0.1%

Top 96% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD 🇯🇵JVN

NVD

CVE.org

EPSS MSRC Vendor

VulDB

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.