What is CVE-2026-85043?

CVE-2026-85043 is a critical-severity vulnerability in Google Chrome, classified under Incomplete Cleanup. CVSS score: 9.1/10. Published 2026-09-03.

How severe is CVE-2026-85043?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Google Chrome

CVE-2026-85043

Incomplete cleanup in Network in Google Chrome prior to 152.0.7977.82 allowed a remote attacker to bypass system access restrictions via crafted network traffic. (Chromium security severity: High)

Published 2026-09-03 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.8th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% 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: 0.004 · change: +0.001

Affected products

Google Chrome

Weakness classification (CWE)

CWE-459 — Incomplete Cleanup

References

chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0188279… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/533502257 (Permissions Required)

Frequently asked questions

What is CVE-2026-85043?: CVE-2026-85043 is a critical-severity vulnerability in Google Chrome, classified under Incomplete Cleanup. CVSS score: 9.1/10. Published 2026-09-03.
How severe is CVE-2026-85043?: Critical severity. CVSS v3 base score is 9.1 out of 10.