Description
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.
Published: 2026-08-19
Score: 6.2 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this vulnerability, ensure that the `volsync-addon-deploy-type` annotation is not explicitly set to `olm`. The default Helm deployment type for volsync-addon-controller in Red Hat Advanced Cluster Management for Kubernetes (since ACM 2.13) is not affected by this flaw.

Tracking

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Advisories

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History

Fri, 21 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat advanced Cluster Management For Kubernetes
Vendors & Products Redhat advanced Cluster Management For Kubernetes

Thu, 20 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 19 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 19 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Volsync-addon-controller: volsync-addon-controller: annotation values rendered into yaml via text/template without escaping allows yaml injection into subscription
First Time appeared Redhat
Redhat acm
Weaknesses CWE-94
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H'}


Subscriptions

Redhat Acm Advanced Cluster Management For Kubernetes
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-19T19:59:57.514Z

Reserved: 2026-08-04T17:21:18.911Z

Link: CVE-2026-18874

cve-icon Vulnrichment

Updated: 2026-08-19T19:54:09.547Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-19T18:16:36.080

Modified: 2026-08-20T13:08:53.900

Link: CVE-2026-18874

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-08-19T17:00:00Z

Links: CVE-2026-18874 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T20:45:03Z

Weaknesses
  • CWE-94

    Improper Control of Generation of Code ('Code Injection')