What is CVE-2026-7909?

CVE-2026-7909 is a low-severity vulnerability in Apple macOS, classified under Protection Mechanism Failure. CVSS score: 3.1/10. Published 2026-05-06.

How severe is CVE-2026-7909?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Apple macOS

CVE-2026-7909

Inappropriate implementation in ServiceWorker in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.002 (11.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.6% 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

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html (Vendor Advisory)
issues.chromium.org/issues/497437113 (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-7909?: CVE-2026-7909 is a low-severity vulnerability in Apple macOS, classified under Protection Mechanism Failure. CVSS score: 3.1/10. Published 2026-05-06.
How severe is CVE-2026-7909?: Low severity. CVSS v3 base score is 3.1 out of 10.