What is the CVSS score of CVE-2026-87493?

CVE-2026-87493 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-87493?

Yes, a patch is available for CVE-2026-87493. Update the affected software to the latest version immediately.

Google Chrome CVE-2026-87493

EUVD-2026-74407 MEDIUM

Missing Authorization (CWE-862)

2026-09-09 Chrome

GHSA-8r2f-4782-ggm7

Google

6.5

CVSS 3.1 · Vendor: Chrome

Severity by source

Vendor (Chrome) PRIMARY

6.5 MEDIUM

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

vuln.today AI

6.5 MEDIUM

Social engineering via crafted HTML is the sole prerequisite (UI:R, PR:N); impact is filesystem write only, so C:N and A:N with I:H.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Chrome).

CVSS VectorVendor: Chrome

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

Metadata Corrected

Sep 10, 2026 - 23:40 vuln.today

tag: Authentication Bypass removed

Analysis Generated

Sep 10, 2026 - 22:41 vuln.today

CVSS changed

Sep 10, 2026 - 20:22 NVD

6.5 (MEDIUM)

Patch available

Sep 09, 2026 - 01:03 EUVD

CVE Published

Sep 09, 2026 - 00:09 cve.org

MEDIUM 6.5

CVE Published

Sep 09, 2026 - 00:09 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)

AnalysisAI

Missing authorization in Chrome's FileSystem component allows a remote attacker to bypass system access restrictions via a crafted HTML page, requiring social engineering to achieve user interaction. Affects all Chrome versions prior to 153.0.8010.36 across desktop platforms. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation	Exploitation requires the victim to visit a crafted HTML page, meaning active user interaction through social engineering is mandatory (UI:R). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	Real-world risk is moderate despite a CVSS base score of 6.5. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation	Upgrade Google Chrome to version 153.0.8010.36 or later immediately; this is the vendor-released patch that resolves the missing authorization in the FileSystem component. … Detailed patch versions, workarounds, and compensating controls in full report.