CVE-2026-87487 — Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page

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HIGH

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page

Published Sep 9, 2026

8.3

HIGH

CVSS 3.1

EPSS 0.39%

Description

Missing authorization in FileSystem in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Affected products

Vendor Google Product Chrome Default
n/a
- Version
  153.0.8010.36
  Status
  affected
  Constraints
  <153.0.8010.36

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Google

Chrome

n/a

Version	Status	Constraints
153.0.8010.36	affected	<153.0.8010.36

Remediation

No remediation recorded yet.

Metrics

0.39% 0.00389

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.00389

Score over time

Sep–Oct 2026

EPSS v5

Percentile over time

EPSS v5

Table of values (2 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	0.39% (0.00389)	30.69th	v5 (v2026.06.15)
Sep 9, 2026	0.34% (0.00341)	27.19th	v5 (v2026.06.15)

Weaknesses (1)

CWE-862

Missing Authorization

References (2)

https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html
Release NotesVendor Advisory
https://issues.chromium.org/issues/495429423
Permissions Required

Link	Providers	Tags
https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html		Release NotesVendor Advisory
https://issues.chromium.org/issues/495429423		Permissions Required