Red Hat Security Advisory: OpenShift Container Platform 4.18.48 bug fix and security update
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.18.48. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:37189 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/
AI Analysis
Technical Summary
CVE-2026-26996 is a Regular Expression Denial of Service (ReDoS) vulnerability found in the minimatch library used by Red Hat OpenShift Container Platform. The vulnerability arises from inefficient regular expression processing when handling specially crafted glob patterns containing many consecutive wildcard characters, causing exponential backtracking and high CPU usage. This can lead to denial of service by making the application unresponsive. Exploitation requires that untrusted input be processed by the vulnerable component. Red Hat has released OpenShift Container Platform 4.20.24 with updated container images and packages that address this vulnerability. The advisory includes instructions for upgrading and references to the fixed container image digests for multiple architectures.
Potential Impact
Successful exploitation of this vulnerability results in a denial of service condition due to excessive CPU resource consumption caused by the vulnerable regular expression engine processing crafted input. This can make the OpenShift Container Platform unresponsive. There is no impact on confidentiality or integrity. Exploitation requires processing of untrusted input, which may be limited by deployment context.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform 4.20.24 and later versions. Users should upgrade to these updated packages and container images as soon as possible following Red Hat's documented upgrade procedures. The vendor manages remediation for this on-premise/private cloud platform via these updates. No additional mitigations are specified beyond applying the official update.
Red Hat Security Advisory: OpenShift Container Platform 4.18.48 bug fix and security update
Description
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.18.48. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:37189 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-26996 is a Regular Expression Denial of Service (ReDoS) vulnerability found in the minimatch library used by Red Hat OpenShift Container Platform. The vulnerability arises from inefficient regular expression processing when handling specially crafted glob patterns containing many consecutive wildcard characters, causing exponential backtracking and high CPU usage. This can lead to denial of service by making the application unresponsive. Exploitation requires that untrusted input be processed by the vulnerable component. Red Hat has released OpenShift Container Platform 4.20.24 with updated container images and packages that address this vulnerability. The advisory includes instructions for upgrading and references to the fixed container image digests for multiple architectures.
Potential Impact
Successful exploitation of this vulnerability results in a denial of service condition due to excessive CPU resource consumption caused by the vulnerable regular expression engine processing crafted input. This can make the OpenShift Container Platform unresponsive. There is no impact on confidentiality or integrity. Exploitation requires processing of untrusted input, which may be limited by deployment context.
Mitigation Recommendations
A fix is available in Red Hat OpenShift Container Platform 4.20.24 and later versions. Users should upgrade to these updated packages and container images as soon as possible following Red Hat's documented upgrade procedures. The vendor manages remediation for this on-premise/private cloud platform via these updates. No additional mitigations are specified beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:21709
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-33186","CVE-2026-34986"]
- Cvss Version
- null
Threat ID: 6a1f4e80e29bf47b5007c192
Added to database: 06/02/2026, 21:43:28 UTC
Last enriched: 08/10/2026, 17:19:43 UTC
Last updated: 08/31/2026, 15:41:53 UTC
Views: 434
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