What is CVE-2026-78892?

CVE-2026-78892 is a high-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-08-25.

How severe is CVE-2026-78892?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Google Chrome

CVE-2026-78892

Incorrect authorization in Chromoting in Google Chrome on on Windows prior to 152.0.7977.65 allowed a local attacker to bypass system access restrictions via a local program. (Chromium security severity: Medium)

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.001 (1.3th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Google Chrome

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/518053893 (Permissions Required)

Frequently asked questions

What is CVE-2026-78892?: CVE-2026-78892 is a high-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-08-25.
How severe is CVE-2026-78892?: High severity. CVSS v3 base score is 7.1 out of 10.