RH
Product
Red Hat OpenShift Container Platform 4.21
by Red Hat · last CVE Oct 14, 2026
On CISA KEVExploited in the wild
84
CVEs
2
On KEV
10.0
Max CVSS
5
New 30D
Severity mix
Critical 15High 58Medium 11Low 0
Watch

Add Red Hat OpenShift Container Platform 4.21 to your stack to get only the CVEs that touch what you run.

CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-50236
7.4
0%
Aug 11
Openshift/console: authenticated ssrf with full response reflection and path neutralization via dev console webhook helpers in openshift console
Affected: All versions, or not specified
CVE-2026-50237
7.4
0%
Aug 11
Openshift/console: namespace tenant ssrf with egress bypass, catalog poisoning, and admin-mediated supply chain escalation via projecthelmchartrepository in openshift console
Affected: All versions, or not specified
CVE-2026-42033
7.4
1%
Apr 24
Axios: Prototype Pollution Gadgets - Response Tampering, Data Exfiltration, and Request Hijacking
Affected: All versions, or not specified
CVE-2026-75886
7.2
0%
Sep 23
Openshift/console: openshift/console: unauthenticated reverse proxy to in-cluster catalogd service with session token forwarding
Affected: All versions, or not specified
CVE-2026-96577
7.1
0%
Oct 1
Oc-mirror__release-4.21: embedded local cache registry listens on all interfaces without authentication, with delete enabled
Affected: All versions, or not specified
CVE-2026-87114
7.1
0%
Sep 28
Kube-compare: container:// reference extraction runs the image entrypoint and silently escalates to sudo
Affected: All versions, or not specified
CVE-2026-46243
7.1
0%
Jun 1
smb: client: reject userspace cifs.spnego descriptions
Affected: All versions, or not specified
CVE-2025-54518
7.0
0%
May 15
Improper isolation of shared resources within the CPU operation cache on Zen 2-based products could allow an attacker to corrupt instructions executed at a different privilege…
Affected: All versions, or not specified
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