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CVE-2026-25639VulnerabilityPublished Updated

Red Hat Security Advisory: OpenShift Container Platform 4.21.7 bug fix and security update

Affects Red HatSource GCVE Database

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Not known to be exploited · fixed in Red Hat package updates : patch Red Hat soon.

Data as of 30 Oct 2026, 06:59 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
2.7% chance of exploitation in 30 days – higher than 86% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.21.7

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Users of OpenShift Container Platform 4.21 should upgrade to version 4.21.7 by applying the updated container images and RPM packages as provided in the Red Hat advisories. Detailed upgrade instructions are available in the official Red Hat OpenShift documentation. This update is the official fix for the identified security issues.

Description

Red Hat OpenShift Container Platform 4.21.7 includes a security update addressing several bugs and enhancements. This update is rated as having an important security impact and is intended for on-premise or private cloud Kubernetes deployments. Users of OpenShift Container Platform 4.21 are advised to upgrade to this release to apply the security fixes and improvements.

References

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