redhat enterprise-linux CVE-2026-16487 vulnerability in Red Hat Products
Published on October 19, 2026

Bootc: containers-common: bootc: automatic updates can apply unsigned mutable-tag content under default containers policy
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.

NVD

Vulnerability Analysis

CVE-2026-16487 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Timeline

Reported to Red Hat.

Made public. 81 days later.

Weakness Type

Insufficient Verification of Data Authenticity

The software does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.


Products Associated with CVE-2026-16487

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Red Hat Enterprise Linux (RHEL)
 
Red Hat Hummingbird
 
Red Hat Openshift
 

Affected Versions

Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Hardened Images: Red Hat Hardened Images: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: