What is CVE-2026-13034?

CVE-2026-13034 is a medium-severity vulnerability in Apple macOS, classified under Origin Validation Error. CVSS score: 4.7/10. Published 2026-06-24.

How severe is CVE-2026-13034?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Apple macOS

CVE-2026-13034

Inappropriate implementation in Passwords in Google Chrome prior to 149.0.7827.197 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

Published 2026-06-24 · last modified 2026-06-25.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.3% 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-346 — Origin Validation Error

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0482630… (Vendor Advisory)
issues.chromium.org/issues/523699355 (Permissions Required)

Frequently asked questions

What is CVE-2026-13034?: CVE-2026-13034 is a medium-severity vulnerability in Apple macOS, classified under Origin Validation Error. CVSS score: 4.7/10. Published 2026-06-24.
How severe is CVE-2026-13034?: Medium severity. CVSS v3 base score is 4.7 out of 10.