What is CVE-2026-12438?

CVE-2026-12438 is a high-severity vulnerability in Google Android, classified under Protection Mechanism Failure. CVSS score: 8.3/10. Published 2026-06-17.

How severe is CVE-2026-12438?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Google Android

CVE-2026-12438

Inappropriate implementation in WebView in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

Published 2026-06-17 · last modified 2026-06-18.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (9.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Android
Google Chrome — versions 149.0.7827.155

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175051… (Vendor Advisory)
issues.chromium.org/issues/516947912 (Permissions Required)

Frequently asked questions

What is CVE-2026-12438?: CVE-2026-12438 is a high-severity vulnerability in Google Android, classified under Protection Mechanism Failure. CVSS score: 8.3/10. Published 2026-06-17.
How severe is CVE-2026-12438?: High severity. CVSS v3 base score is 8.3 out of 10.