Cyber Resilience

CVE-2026-9123

HighUpdated

Published: 20 May 2026

Published
20 May 2026
Modified
05 June 2026
KEV Added
—
Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0017 6.9th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-9123 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Google Chrome. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 6.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Heap buffer overflow in Chromecast in Google Chrome on Android, Linux, ChromeOS prior to 148.0.7778.179 allowed a local attacker to execute arbitrary code inside a sandbox via malicious network traffic. (Chromium security severity: Medium)

CWE(s)
CWE-122

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Why these techniques?

Heap buffer overflow enables client-side arbitrary code execution via malicious network traffic.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2026-7992Same product: Google Chrome
CVE-2026-7898Same product: Google Chrome
CVE-2026-7339Same product: Google Chrome
CVE-2026-8509Same product: Google Chrome
CVE-2025-8879Same product: Google Chrome
CVE-2026-5272Same product: Google Chrome
CVE-2026-8529Same product: Google Chrome
CVE-2026-2648Same product: Google Chrome
CVE-2025-12438Same product: Google Chrome
CVE-2026-9117Same product: Google Chrome

Affected Assets

google
chrome
≤ 148.0.7778.179

Mitigating Controls

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

References