High severity · published Oct 19, 2026
CVE-2026-16460
Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalization
7.4
CVSS
0.1%
EPSS
No
On KEV
Description
A flaw was found in bootc and ostree. Already-staged deployments are finalized without revalidating the deployment's container image against the current containers signature policy. Unsigned OS content staged under a prior permissive policy can remain bootable after policy is hardened to reject unsigned images, leading to full host compromise on reboot.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Hardened Images · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-16460
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-16460
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-16460
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2503167
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