What is CVE-2026-16487?

CVE-2026-16487 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.1/10. Published 2026-10-19.

How severe is CVE-2026-16487?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-16487

A flaw was found in bootc when operating with the default containers signature policy. Automatic or manual upgrades of a mutable image tag may apply unsigned content for registries that fall through to insecureAcceptAnything, allowing an attacker who can update that tag to execute arbitrary OS content as the host root filesystem on reboot.

Published 2026-10-19.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

access.redhat.com/security/cve/CVE-2026-16487 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-16487?: CVE-2026-16487 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.1/10. Published 2026-10-19.
How severe is CVE-2026-16487?: High severity. CVSS v3 base score is 8.1 out of 10.