What is CVE-2026-13919?

CVE-2026-13919 is a medium-severity vulnerability in Google Chrome, classified under CWE-602. CVSS score: 6.5/10. Published 2026-06-30.

How severe is CVE-2026-13919?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Google Chrome

CVE-2026-13919

Insufficient policy enforcement in Extensions in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)

Published 2026-06-30 · last modified 2026-07-01.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Google Chrome — versions 150.0.7871.47

Weakness classification (CWE)

CWE-602

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0175352… (Release Notes)
issues.chromium.org/issues/511249430 (Permissions Required)

Frequently asked questions

What is CVE-2026-13919?: CVE-2026-13919 is a medium-severity vulnerability in Google Chrome, classified under CWE-602. CVSS score: 6.5/10. Published 2026-06-30.
How severe is CVE-2026-13919?: Medium severity. CVSS v3 base score is 6.5 out of 10.