What is CVE-2026-5889?

CVE-2026-5889 is a medium-severity vulnerability in Apple macOS, classified under Inadequate Encryption Strength. CVSS score: 4.3/10. Published 2026-04-08.

How severe is CVE-2026-5889?

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

Vulnerability in Apple macOS

CVE-2026-5889

Cryptographic Flaw in PDFium in Google Chrome prior to 147.0.7727.55 allowed an attacker to read potentially sensitive information from encrypted PDFs via a brute-force attack. (Chromium security severity: Medium)

EPSS: 0.001 (1.1th percentile) — read the EPSS interpretation.

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.

Affected products

Apple Macos
Google Chrome — versions 147.0.7727.55
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-326 — Inadequate Encryption Strength

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-5889?: CVE-2026-5889 is a medium-severity vulnerability in Apple macOS, classified under Inadequate Encryption Strength. CVSS score: 4.3/10. Published 2026-04-08.
How severe is CVE-2026-5889?: Medium severity. CVSS v3 base score is 4.3 out of 10.