chromium-browser: chromium-browser: Out of bounds write in V8
Published Sep 9, 2026 ·Due Sep 23, 2026
8.8
HIGHCVSS 3.1
EPSS 3.14%
Description
Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
Affected products
-
- Version 153.0.8010.36StatusaffectedConstraints<153.0.8010.36
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
Date Added
Sep 9, 2026
Patch Due
Sep 23, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Sep 9, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.14% (0.03142) | 87.46th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.00% (0.00997) | 61.19th | v5 (v2026.06.15) |
| Sep 9, 2026 | 0.29% (0.00291) | 21.44th | v5 (v2026.06.15) |
References (8)
- https://access.redhat.com/security/cve/CVE-2026-87491 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2530431 Issue Tracking
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html Release NotesVendor Advisory
- https://issues.chromium.org/issues/543557673 Permissions Required
- https://nvd.nist.gov/vuln/detail/CVE-2026-87491
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491 government-resourceUS Government Resource
- https://www.cve.org/CVERecord?id=CVE-2026-87491
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-87491 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2530431 | Issue Tracking | |
| https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html | Release NotesVendor Advisory | |
| https://issues.chromium.org/issues/543557673 | Permissions Required | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-87491 | ||
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog | ||
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491 | government-resourceUS Government Resource | |
| https://www.cve.org/CVERecord?id=CVE-2026-87491 |
Change history (0)
No recorded changes yet.