What is CVE-2026-8586?

CVE-2026-8586 is a medium-severity vulnerability in Google Chrome, classified under Improper Access Control. CVSS score: 5.5/10. Published 2026-05-14.

How severe is CVE-2026-8586?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Google Chrome

CVE-2026-8586

Inappropriate implementation in Chromoting in Google Chrome prior to 148.0.7778.168 allowed a local attacker to bypass discretionary access control via a malicious file. (Chromium security severity: Medium)

Published 2026-05-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.7% 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 — versions 148.0.7778.168

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html (Vendor Advisory)
issues.chromium.org/issues/499154022 (Permissions Required)

Frequently asked questions

What is CVE-2026-8586?: CVE-2026-8586 is a medium-severity vulnerability in Google Chrome, classified under Improper Access Control. CVSS score: 5.5/10. Published 2026-05-14.
How severe is CVE-2026-8586?: Medium severity. CVSS v3 base score is 5.5 out of 10.