Vulnerability-Lookup

GHSA-9W6H-CH94-8J27

Vulnerability from github – Published: 2026-08-19 18:32 – Updated: 2026-08-27 06:31

Details

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.

Severity

6.2 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-18874"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-19T18:16:36Z",
    "severity": "MODERATE"
  },
  "details": "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 \u0027volsync-addon-deploy-type: olm\u0027 annotation is explicitly enabled.",
  "id": "GHSA-9w6h-ch94-8j27",
  "modified": "2026-08-27T06:31:23Z",
  "published": "2026-08-19T18:32:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18874"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60386"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60387"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60388"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60389"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60390"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:60391"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18874"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511115"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-18874 (GCVE-0-2026-18874)

Vulnerability from cvelistv5 – Published: 2026-08-19 17:52 – Updated: 2026-09-08 21:23

Title

Volsync-addon-controller: volsync-addon-controller: annotation values rendered into yaml via text/template without escaping allows yaml injection into subscription

Summary

Severity

6.2 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 19:54 UTC

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

redhat redhat root

References

8 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:60386	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60387	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60388	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60389	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60390	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60391	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18874	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511115	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.11	Unaffected: 1787683560 , < * (rpm) cpe:/a:redhat:acm:2.11::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.13	Unaffected: 1787266564 , < * (rpm) cpe:/a:redhat:acm:2.13::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.14	Unaffected: 1787266564 , < * (rpm) cpe:/a:redhat:acm:2.14::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.15	Unaffected: 1787266360 , < * (rpm) cpe:/a:redhat:acm:2.15::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.16	Unaffected: 1787266564 , < * (rpm) cpe:/a:redhat:acm:2.16::el9
Red Hat	Red Hat Advanced Cluster Management for Kubernetes 2.17	Unaffected: 1787266556 , < * (rpm) cpe:/a:redhat:acm:2.17::el9

Date Public

2026-08-19 17:00

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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                "id": "CVE-2026-18874",
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                  {
                    "Exploitation": "none"
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                  },
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                    "Technical Impact": "partial"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T19:54:04.444241Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.