CriticalFix available
Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update
Type: advisorySources: OSV
- Products
- microshift, microshift-greenboot, microshift-multus, microshift-multus-release-info, microshift-networking, microshift-olm, microshift-olm-release-info, microshift-release-info, microshift-selinux
- Affected versions
- Not specified
- Fixed versions
- 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
- CVEs
- CVE-2026-33186
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 09:06 UTC · Revision 1
Source evidence
Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update
core-osv · Original sourcePublished 28 May 2026, 10:07 UTC
Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update
osv:RHSA-2026:20436
microshift
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-greenboot
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-multus
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-multus-release-info
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-networking
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-olm
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-olm-release-info
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-release-info
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
microshift-selinux
Fixed versions: 0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9
Complete source record
{
"id": "1c5549f62aa3d93c90b8546b6657cc918a2255194a4868c017c813a8f239f120",
"url": "https://osv.dev/vulnerability/RHSA-2026%3A20436",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update",
"summary": "Red Hat Security Advisory: Red Hat build of MicroShift 4.16.63 security update",
"evidence": "osv:RHSA-2026:20436",
"products": [
{
"name": {
"value": "microshift",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-greenboot",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-multus",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-multus-release-info",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-networking",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-olm",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-olm-release-info",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-release-info",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "microshift-selinux",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "RHSA-2026:20436",
"aliases": [
"RHSA-2026:20436"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift",
"purl": "pkg:rpm/redhat/microshift",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-greenboot",
"purl": "pkg:rpm/redhat/microshift-greenboot",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-multus",
"purl": "pkg:rpm/redhat/microshift-multus",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-multus-release-info",
"purl": "pkg:rpm/redhat/microshift-multus-release-info",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-networking",
"purl": "pkg:rpm/redhat/microshift-networking",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-olm",
"purl": "pkg:rpm/redhat/microshift-olm",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-olm-release-info",
"purl": "pkg:rpm/redhat/microshift-olm-release-info",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-release-info",
"purl": "pkg:rpm/redhat/microshift-release-info",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0:4.16.63-202605251227.p0.g1133ac0.assembly.4.16.63.el9"
}
]
}
],
"package": {
"name": "microshift-selinux",
"purl": "pkg:rpm/redhat/microshift-selinux",
"ecosystem": "Red Hat:openshift:4.16::el9"
},
"database_specific": {
"source": "https://security.access.redhat.com/data/osv/RHSA-2026:20436.json"
}
}
],
"modified": "2026-10-20T10:05:53Z",
"provider": "osv",
"upstream": [
"CVE-2026-33186"
],
"references": [
"https://access.redhat.com/errata/RHSA-2026:20436",
"https://access.redhat.com/security/updates/classification/#important",
"https://bugzilla.redhat.com/show_bug.cgi?id=2449833",
"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_20436.json",
"https://access.redhat.com/security/cve/CVE-2026-33186",
"https://www.cve.org/CVERecord?id=CVE-2026-33186",
"https://nvd.nist.gov/vuln/detail/CVE-2026-33186",
"https://github.com/grpc/grpc-go/security/advisories/GHSA-p77j-4mvh-x3m3"
]
},
"related_cves": [
{
"value": "CVE-2026-33186",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 378039,
"published_at": "2026-05-28T10:07:21+00:00"
}