CVE-2026-118346

chromium-browser: Use after free in Compositing

Published Oct 27, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
Out of bounds read in Compositing in Google Chrome prior to 156.0.8078.73 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4878-1 chromium security update
History
Type Values Removed Values Added
Description Use after free in Compositing in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High) Out of bounds read in Compositing in Google Chrome prior to 156.0.8078.73 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-125
Type Values Removed Values Added
Title chromium-browser: Use after free in Compositing
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
CPEs cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title Use‑After‑Free in Chrome’s Compositing Enables Remote Code Execution
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome
Type Values Removed Values Added
Title Use‑After‑Free in Chrome’s Compositing Enables Remote Code Execution
Type Values Removed Values Added
Description Use after free in Compositing in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-416
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Chrome
Published
Updated
Nov 3, 2026, 9:18 PM
Reserved
Oct 27, 2026, 9:35 PM
Status
Modified
Published
Oct 27, 2026, 11:17 PM
Modified
Nov 3, 2026, 10:19 PM
Severity
Important
Public date
Oct 27, 2026, 11:03 PM