What is CVE-2026-5291?

CVE-2026-5291 is a medium-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-04-01.

How severe is CVE-2026-5291?

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

Information disclosure in Apple macOS

CVE-2026-5291

Inappropriate implementation in WebGL in Google Chrome prior to 146.0.7680.178 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

Vulnerability class: Information Disclosure

Published 2026-04-01 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% 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: 0.003 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html (Vendor Advisory)
issues.chromium.org/issues/490118036 (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-5291?: CVE-2026-5291 is a medium-severity vulnerability in Apple macOS, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-04-01.
How severe is CVE-2026-5291?: Medium severity. CVSS v3 base score is 6.5 out of 10.