What is CVE-2026-113186?

CVE-2026-113186 is a critical-severity vulnerability in Google Chrome, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.6/10. Published 2026-10-20.

How severe is CVE-2026-113186?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Buffer overflow in Google Chrome

CVE-2026-113186

Memory corruption in DevTools in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Low)

Vulnerability class: Buffer Overflow

Published 2026-10-20 · last modified 2026-10-21.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Google Chrome

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Frequently asked questions

What is CVE-2026-113186?: CVE-2026-113186 is a critical-severity vulnerability in Google Chrome, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.6/10. Published 2026-10-20.
How severe is CVE-2026-113186?: Critical severity. CVSS v3 base score is 9.6 out of 10.