What is CVE-2026-5865?

CVE-2026-5865 is a high-severity vulnerability in Apple macOS, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-04-08.

How severe is CVE-2026-5865?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-5865 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Apple macOS

CVE-2026-5865

Type Confusion in V8 in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

Published 2026-04-08 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (36.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

Public proof-of-concept exploits

References

chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html (Release Notes, Vendor Advisory)
issues.chromium.org/issues/491884710 (Permissions Required)

Frequently asked questions

What is CVE-2026-5865?: CVE-2026-5865 is a high-severity vulnerability in Apple macOS, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-04-08.
How severe is CVE-2026-5865?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-5865 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.