What is CVE-2026-15108?

CVE-2026-15108 is a medium-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 4.3/10. Published 2026-07-08.

How severe is CVE-2026-15108?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Integer overflow in Google Chrome

CVE-2026-15108

Integer overflow in Extensions API in Google Chrome prior to 150.0.7871.115 allowed an attacker who convinced a user to install a malicious extension to perform an out of bounds memory read via a crafted Chrome Extension. (Chromium security severity: High)

Vulnerability class: Integer Overflow

Published 2026-07-08 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (8.7th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Chrome — versions 150.0.7871.115

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0116222… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/515443146 (Permissions Required)

Frequently asked questions

What is CVE-2026-15108?: CVE-2026-15108 is a medium-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 4.3/10. Published 2026-07-08.
How severe is CVE-2026-15108?: Medium severity. CVSS v3 base score is 4.3 out of 10.