Cyber Resilience

CVE-2026-9921

MediumUpdated

Published: 28 May 2026

Published
28 May 2026
Modified
17 June 2026
KEV Added
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Patch
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CVSS Score v3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
EPSS Score 0.0024 14.7th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-9921 is a medium-severity Use of Uninitialized Variable (CWE-457) vulnerability in Google Chrome. Its CVSS base score is 4.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 14.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Uninitialized Use in WebGL in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin information via a crafted HTML page. (Chromium security severity: High)

CWE(s)
CWE-457

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 →
Why these techniques?

Crafted HTML page enables drive-by info leak via browser vuln.

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

CVEs Like This One

CVE-2026-9917Same product: Google Android
CVE-2026-10008Same product: Google Android
CVE-2026-10959Same product: Google Android
CVE-2026-9920Same product: Google Android
CVE-2026-9943Same product: Google Android
CVE-2026-9929Same product: Google Android
CVE-2026-10973Same product: Google Chrome
CVE-2026-10932Same product: Google Android
CVE-2026-11080Same product: Google Android
CVE-2026-11085Same product: Google Android

Affected Assets

google
chrome
≤ 148.0.7778.216

Mitigating Controls

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

References