What is CVE-2026-11143?

CVE-2026-11143 is a medium-severity vulnerability in Google Chrome, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-06-04.

How severe is CVE-2026-11143?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Google Chrome

CVE-2026-11143

Out of bounds read in Extensions in Google Chrome on Linux prior to 149.0.7827.53 allowed an attacker who convinced a user to install a malicious extension to obtain potentially sensitive information from process memory via a crafted Chrom…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Google Chrome — versions 149.0.7827.53
Linux Linux_kernel

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

chrome-cve-admin@google.com (Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-11143?: CVE-2026-11143 is a medium-severity vulnerability in Google Chrome, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-06-04.
How severe is CVE-2026-11143?: Medium severity. CVSS v3 base score is 6.5 out of 10.