CVE-2026-16460 bootc ostree - Authentication Bypass

bootc and ostree contain a broken authentication caused by finalizing already-staged deployments without revalidating container images against current signature policy, letting attackers maintain bootable unsigned OS content after policy hardening, exploit requires prior permissive policy staging.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.08% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-345

Vendor fix

Update to the latest version that revalidates container images against current signature policy before finalizing deployments.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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