What is CVE-2026-91720?

CVE-2026-91720 is a medium-severity vulnerability in Google Chrome, classified under Use of Uninitialized Resource. CVSS score: 4.7/10. Published 2026-09-15.

How severe is CVE-2026-91720?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Google Chrome

CVE-2026-91720

Uninitialized resource in ANGLE in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Published 2026-09-15 · last modified 2026-09-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.6th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.6% 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

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0541751… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/523470135 (Permissions Required)

Frequently asked questions

What is CVE-2026-91720?: CVE-2026-91720 is a medium-severity vulnerability in Google Chrome, classified under Use of Uninitialized Resource. CVSS score: 4.7/10. Published 2026-09-15.
How severe is CVE-2026-91720?: Medium severity. CVSS v3 base score is 4.7 out of 10.