Code injection in Red Hat Advanced Cluster Management for Kubernetes 2.11
Priority LOW 28CWE-94Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-94.
Summary
A flaw was found in volsync-addon-controller. This vulnerability allows an attacker to inject malicious YAML (Yet Another Markup Language) code into the OpenShift Lifecycle Manager (OLM) Subscription resource. This is due to improper escaping of annotation values when they are rendered into YAML. Successful exploitation could lead to unauthorized modification or control over OLM Subscription configurations, potentially impacting software management within the cluster. This issue primarily affects systems where the 'volsync-addon-deploy-type: olm' annotation is explicitly enabled.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00538 45th percentileScored 2026-11-07
Fix Fixed Red Hat: 6 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.11 | — | 1787683560 | Patch available | CNA |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.13 | — | 1787266564 | Patch available | CNA |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.14 | — | 1787266564 | Patch available | CNA |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.15 | — | 1787266360 | Patch available | CNA |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | 1787266564 | Patch available | CNA |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | 1787266556 | Patch available | CNA |
- Red Hat Advanced Cluster Management for Kubernetes 2.11 VendorRed Hat Affected — Fixed in 1787683560 Patch available CNA
- Red Hat Advanced Cluster Management for Kubernetes 2.13 VendorRed Hat Affected — Fixed in 1787266564 Patch available CNA
- Red Hat Advanced Cluster Management for Kubernetes 2.14 VendorRed Hat Affected — Fixed in 1787266564 Patch available CNA
- Red Hat Advanced Cluster Management for Kubernetes 2.15 VendorRed Hat Affected — Fixed in 1787266360 Patch available CNA
- Red Hat Advanced Cluster Management for Kubernetes 2.16 VendorRed Hat Affected — Fixed in 1787266564 Patch available CNA
- Red Hat Advanced Cluster Management for Kubernetes 2.17 VendorRed Hat Affected — Fixed in 1787266556 Patch available CNA
CPE names CNA · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/a:redhat:acm:2.11::el9 | 2.11 | — | Red Hat |
| cpe:/a:redhat:acm:2.13::el9 | 2.13 | — | Red Hat |
| cpe:/a:redhat:acm:2.14::el9 | 2.14 | — | Red Hat |
| cpe:/a:redhat:acm:2.15::el9 | 2.15 | — | Red Hat |
| cpe:/a:redhat:acm:2.16::el9 | 2.16 | — | Red Hat |
| cpe:/a:redhat:acm:2.17::el9 | 2.17 | — | Red Hat |
- cpe:/a:redhat:acm:2.11::el9 Versions 2.11 — ·Red Hat
- cpe:/a:redhat:acm:2.13::el9 Versions 2.13 — ·Red Hat
- cpe:/a:redhat:acm:2.14::el9 Versions 2.14 — ·Red Hat
- cpe:/a:redhat:acm:2.15::el9 Versions 2.15 — ·Red Hat
- cpe:/a:redhat:acm:2.16::el9 Versions 2.16 — ·Red Hat
- cpe:/a:redhat:acm:2.17::el9 Versions 2.17 — ·Red Hat
Remediation
Red Hat 6 advisories
- RHSA-2026:60391 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.16.4 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.16 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-grafana-rhel9, registry.redhat.io/rhacm2/acm-multicluster-observability-addon-rhel9 +19
- RHSA-2026:60390 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.13.11 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.13 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-grafana-rhel9, registry.redhat.io/rhacm2/acm-multicluster-observability-addon-rhel9 +23
- RHSA-2026:60388 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.14.4 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.14 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-grafana-rhel9, registry.redhat.io/rhacm2/acm-multicluster-observability-addon-rhel9 +26
Show 3 more Red Hat advisories
- RHSA-2026:60389 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.15.6 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.15 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-multicluster-observability-addon-rhel9, registry.redhat.io/rhacm2/acm-must-gather-rhel9 +19
- RHSA-2026:60387 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.11.11 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.11 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-must-gather-rhel9, registry.redhat.io/rhacm2/acm-prometheus-config-reloader-rhel9 +24
- RHSA-2026:60386 Released 2026-08-26 · Red Hat rating ImportantRed Hat Advanced Cluster Management for Kubernetes v2.17.1 security update
- Red Hat Advanced Cluster Management for Kubernetes 2.17 registry.redhat.io/rhacm2/acm-governance-policy-addon-controller-rhel9, registry.redhat.io/rhacm2/acm-grafana-rhel9, registry.redhat.io/rhacm2/acm-multicluster-observability-addon-rhel9 +31
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Advanced Cluster Management for Kubernetes 2.11 | Fixed | RHSA-2026:60387 |
| Red Hat Advanced Cluster Management for Kubernetes 2.13 | Fixed | RHSA-2026:60390 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14 | Fixed | RHSA-2026:60388 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 | Fixed | RHSA-2026:60389 |
| Red Hat Advanced Cluster Management for Kubernetes 2.16 | Fixed | RHSA-2026:60391 |
| Red Hat Advanced Cluster Management for Kubernetes 2.17 | Fixed | RHSA-2026:60386 |
Not affected: 6 products
- Red Hat Advanced Cluster Management for Kubernetes 2.11
- Red Hat Advanced Cluster Management for Kubernetes 2.13
- Red Hat Advanced Cluster Management for Kubernetes 2.14
- Red Hat Advanced Cluster Management for Kubernetes 2.15
- Red Hat Advanced Cluster Management for Kubernetes 2.16
- Red Hat Advanced Cluster Management for Kubernetes 2.17
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18874
- 2026-10-03 Alias added: GHSA-9w6h-ch94-8j27
References
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Sources
- CVE-2026-18874 · CVE Program
- CVE-2026-18874 · NVD
- FIRST EPSS
- GHSA-9w6h-ch94-8j27 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-18874 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences