What is CVE-2026-79221?

CVE-2026-79221 is a medium-severity vulnerability in Google Chrome, classified under Use of Uninitialized Resource. CVSS score: 6.5/10. Published 2026-08-25.

How severe is CVE-2026-79221?

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

Vulnerability in Google Chrome

CVE-2026-79221

Uninitialized resource in Dawn in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Published 2026-08-25 · last modified 2026-08-31.

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:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.7th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.7% 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: 0.002 · change: -0.000

Affected products

Google Chrome

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176… (Release Notes)
issues.chromium.org/issues/532923954 (Permissions Required)

Frequently asked questions

What is CVE-2026-79221?: CVE-2026-79221 is a medium-severity vulnerability in Google Chrome, classified under Use of Uninitialized Resource. CVSS score: 6.5/10. Published 2026-08-25.
How severe is CVE-2026-79221?: Medium severity. CVSS v3 base score is 6.5 out of 10.