Vulnerability-Lookup

CVE-2026-15927 (GCVE-0-2026-15927)

Vulnerability from cvelistv5 – Published: 2026-07-21 04:45 – Updated: 2026-07-21 14:55

Title

Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url validation

Summary

A flaw was found in Red Hat Quay's repository-level mirror configuration feature. The POST and PUT handlers in endpoints/api/mirror.py accept an external_reference parameter without SSRF validation, unlike the organization-level mirror handlers which apply validate_external_registry_url(). A repository administrator can supply a crafted hostname that causes the Quay mirror worker to make requests via Skopeo to internal network services, cloud metadata endpoints, or other resources not intended to be reachable from the Quay application.

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

redhat

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-15927	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2501256	issue-trackingx_refsource_REDHAT

Impacted products

2 products

Vendor	Product	Version
Red Hat	mirror registry for Red Hat OpenShift 2	cpe:/a:redhat:mirror_registry:2
Red Hat	Red Hat Quay 3	cpe:/a:redhat:quay:3

Date Public

2026-07-16 00:00

Credits

This issue was discovered by Martin Brodeur and Shaon Hossain (Red Hat).

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-15927

Vulnerability from fkie_nvd - Published: 2026-07-21 06:16 - Updated: 2026-07-21 18:31

Severity

6.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-15927
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2501256

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:mirror_registry:2"
          ],
          "defaultStatus": "affected",
          "packageName": "openshift/mirror-registry-rhel8",
          "product": "mirror registry for Red Hat OpenShift 2",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:quay:3"
          ],
          "defaultStatus": "affected",
          "packageName": "quay/quay-rhel8",
          "product": "Red Hat Quay 3",
          "vendor": "Red Hat"
        },
        {
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          "cpes": [
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          ],
          "defaultStatus": "affected",
          "packageName": "quay/quay-rhel9",
          "product": "Red Hat Quay 3",
          "vendor": "Red Hat"
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    }
  ],
  "id": "CVE-2026-15927",
  "lastModified": "2026-07-21T18:31:51.680",
  "metrics": {
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          "attackVector": "NETWORK",
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          "baseScore": 6.8,
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GHSA-9RPM-RWWC-XW43

Vulnerability from github – Published: 2026-07-21 06:31 – Updated: 2026-07-21 06:31

Details

Severity

6.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-15927"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T06:16:28Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in Red Hat Quay\u0027s repository-level mirror configuration\nfeature. The POST and PUT handlers in endpoints/api/mirror.py accept an\nexternal_reference parameter without SSRF validation, unlike the\norganization-level mirror handlers which apply validate_external_registry_url().\nA repository administrator can supply a crafted hostname that causes the Quay\nmirror worker to make requests via Skopeo to internal network services, cloud\nmetadata endpoints, or other resources not intended to be reachable from the\nQuay application.",
  "id": "GHSA-9rpm-rwwc-xw43",
  "modified": "2026-07-21T06:31:18Z",
  "published": "2026-07-21T06:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15927"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-15927"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2501256"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-15927 (GCVE-0-2026-15927)

FKIE_CVE-2026-15927

GHSA-9RPM-RWWC-XW43

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