Red Hat Security Advisory: Assisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.9.4
Assisted Installer RHEL 8 integrates components for the general multicluster engine for Kubernetes 2.9.4 release that simplify the process of deploying OpenShift Container Platform clusters. The multicluster engine for Kubernetes provides the foundational components that are necessary for the centralized management of multiple Kubernetes-based clusters across data centers, public clouds, and private clouds. You can use the engine to create new Red Hat OpenShift Container Platform clusters, or to import existing Kubernetes-based clusters for management. After the clusters are managed, you can use the APIs that are provided by the engine to distribute configuration based on placement policy.
AI Analysis
Technical Summary
The Red Hat multicluster engine for Kubernetes 2.9.4 includes components that use the Go JOSE library for handling JSON Web Encryption (JWE) objects. A flaw in Go JOSE (CVE-2026-34986) allows a remote attacker to cause a denial of service by sending a crafted JWE object where the encrypted key field is empty despite specifying a key wrapping algorithm. This leads to an application crash during decryption. The vulnerability is classified under CWE-131 (Incorrect Calculation of Buffer Size) and can cause service unavailability. Red Hat has not provided a patch or mitigation that meets their criteria for ease of use and applicability. The advisory references Red Hat Advanced Cluster Management 2.14 documentation for installation and usage but does not indicate a fix for this issue.
Potential Impact
The vulnerability can cause a denial of service (DoS) by crashing the affected service when processing maliciously crafted JWE objects. This results in unavailability of the multicluster engine for Kubernetes components that rely on the Go JOSE library for encryption handling. There is no indication of confidentiality or integrity compromise, only availability impact.
Mitigation Recommendations
Red Hat currently does not provide a fix or mitigation that meets their criteria for this vulnerability. Users should monitor Red Hat advisories for future updates or patches. No specific workaround is documented. Customers with a Technical Account Manager (TAM) can consult directly with Red Hat for guidance. Until a fix is available, minimizing exposure to untrusted inputs that trigger the vulnerability may reduce risk.
Red Hat Security Advisory: Assisted Installer RHEL 8 components for Multicluster Engine for Kubernetes 2.9.4
Description
Assisted Installer RHEL 8 integrates components for the general multicluster engine for Kubernetes 2.9.4 release that simplify the process of deploying OpenShift Container Platform clusters. The multicluster engine for Kubernetes provides the foundational components that are necessary for the centralized management of multiple Kubernetes-based clusters across data centers, public clouds, and private clouds. You can use the engine to create new Red Hat OpenShift Container Platform clusters, or to import existing Kubernetes-based clusters for management. After the clusters are managed, you can use the APIs that are provided by the engine to distribute configuration based on placement policy.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Red Hat multicluster engine for Kubernetes 2.9.4 includes components that use the Go JOSE library for handling JSON Web Encryption (JWE) objects. A flaw in Go JOSE (CVE-2026-34986) allows a remote attacker to cause a denial of service by sending a crafted JWE object where the encrypted key field is empty despite specifying a key wrapping algorithm. This leads to an application crash during decryption. The vulnerability is classified under CWE-131 (Incorrect Calculation of Buffer Size) and can cause service unavailability. Red Hat has not provided a patch or mitigation that meets their criteria for ease of use and applicability. The advisory references Red Hat Advanced Cluster Management 2.14 documentation for installation and usage but does not indicate a fix for this issue.
Potential Impact
The vulnerability can cause a denial of service (DoS) by crashing the affected service when processing maliciously crafted JWE objects. This results in unavailability of the multicluster engine for Kubernetes components that rely on the Go JOSE library for encryption handling. There is no indication of confidentiality or integrity compromise, only availability impact.
Mitigation Recommendations
Red Hat currently does not provide a fix or mitigation that meets their criteria for this vulnerability. Users should monitor Red Hat advisories for future updates or patches. No specific workaround is documented. Customers with a Technical Account Manager (TAM) can consult directly with Red Hat for guidance. Until a fix is available, minimizing exposure to untrusted inputs that trigger the vulnerability may reduce risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18584
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-34986"]
- State
- PUBLISHED
Threat ID: 6a16095be29bf47b506237dc
Added to database: 05/26/2026, 20:58:03 UTC
Last enriched: 08/14/2026, 19:14:46 UTC
Last updated: 09/14/2026, 00:46:43 UTC
Views: 83
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.