Cyber Resilience

CVE-2026-9121

High

Published: 20 May 2026

Published
20 May 2026
Modified
21 May 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0033 24.9th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-9121 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Google Chrome. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 24.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Out of bounds read in GPU in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

CWE(s)
CWE-125

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

OOB read in browser GPU component via crafted HTML enables drive-by client exploitation and code execution.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-4460Same product: Apple Macos
CVE-2026-4674Same product: Apple Macos
CVE-2026-4462Same product: Apple Macos
CVE-2026-4677Same product: Apple Macos
CVE-2026-5292Same product: Apple Macos
CVE-2026-3540Same product: Apple Macos
CVE-2026-3926Same product: Apple Macos
CVE-2026-3916Same product: Apple Macos
CVE-2025-12725Same product: Apple Macos
CVE-2026-4459Same product: Apple Macos

Affected Assets

google
chrome
≤ 148.0.7778.178

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References