{"id":"CVE-2026-16460","title":"Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalization","summary":"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 pol…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-345"],"vendor":"Red Hat","product":"bootc","affected":["bootc","ostree","rpm-ostree","ostree","bootc","ostree","rpm-ostree","bootc (all versions)","ostree (all versions)","ostree","rhcos"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-19T17:30:04.698872Z"},"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:30:27.256Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-16460","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-16460"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2503167","label":"RHBZ#2503167"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16460.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-16460"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16460"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00078,"epssPercentile":0.00111,"ingestedAt":"2026-10-19T07:09:59.594Z","slug":"CVE-2026-16460","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `bootc`\n- `ostree`\n- `rpm-ostree`\n- `ostree`\n- `bootc`\n- `ostree`\n- `rpm-ostree`\n- `bootc (all versions)`\n- `ostree (all versions)`\n- `ostree`\n- `rhcos`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-10-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16460.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}