What is CVE-2026-79031?

CVE-2026-79031 is a low-severity vulnerability in Google Chrome, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.1/10. Published 2026-08-25.

How severe is CVE-2026-79031?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Google Chrome

CVE-2026-79031

Improper resource exposure in Preload in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)

Published 2026-08-25 · last modified 2026-08-28.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (13.9th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.9% 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: -0.001

Affected products

Google Chrome

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/503472696 (Permissions Required)

Frequently asked questions

What is CVE-2026-79031?: CVE-2026-79031 is a low-severity vulnerability in Google Chrome, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.1/10. Published 2026-08-25.
How severe is CVE-2026-79031?: Low severity. CVSS v3 base score is 3.1 out of 10.