Vulnerability-Lookup

CVE-2026-2733 (GCVE-0-2026-2733)

Vulnerability from cvelistv5 – Published: 2026-02-19 07:48 – Updated: 2026-03-06 03:31

Title

Org.keycloak/keycloak-services: keycloak: missing check on disabled client for docker registry protocol

Summary

A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client “Enabled” setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.

Severity

3.8 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-19 21:31 UTC

CWE

CWE-285 - Improper Authorization

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:3947	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3948	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-2733	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2440895	issue-trackingx_refsource_REDHAT

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4.10-1 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4-12 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4.10	cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat Build of Keycloak	cpe:/a:redhat:build_keycloak:
Red Hat	Red Hat JBoss Enterprise Application Platform 8	cpe:/a:redhat:jboss_enterprise_application_platform:8
Red Hat	Red Hat JBoss Enterprise Application Platform Expansion Pack	cpe:/a:redhat:jbosseapxp
Red Hat	Red Hat Single Sign-On 7	cpe:/a:redhat:red_hat_single_sign_on:7

Date Public

2026-02-19 00:00

Credits

Red Hat would like to thank Joy Gilbert and Reynaldo Immanuel for reporting this issue.

Show details on NVD website

JSON

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This means that turning the client \\u201cEnabled\\u201d setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-285\", \"description\": \"Improper Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-03-06T03:31:23.662Z\"}, \"x_redhatCweChain\": \"CWE-285: Improper Authorization\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-2733\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-06T03:31:23.662Z\", \"dateReserved\": \"2026-02-19T07:15:32.860Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-02-19T07:48:08.910Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-2733

Vulnerability from fkie_nvd - Published: 2026-02-19 08:16 - Updated: 2026-06-17 10:31

Severity

3.8 (Low) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:3947
	secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:3948
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-2733
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2440895

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-operator-bundle",
          "product": "Red Hat build of Keycloak 26.4",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "26.4.10-1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-rhel9",
          "product": "Red Hat build of Keycloak 26.4",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "26.4-12",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-rhel9-operator",
          "product": "Red Hat build of Keycloak 26.4",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "26.4-12",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:26.4::el9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "rhbk/keycloak-rhel9",
          "product": "Red Hat build of Keycloak 26.4.10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-operator-bundle",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
          "defaultStatus": "affected",
          "packageName": "rhbk/keycloak-rhel9-operator",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "cpes": [
            "cpe:/a:redhat:jboss_enterprise_application_platform:8"
          ],
          "defaultStatus": "affected",
          "packageName": "keycloak-services",
          "product": "Red Hat JBoss Enterprise Application Platform 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "cpes": [
            "cpe:/a:redhat:jbosseapxp"
          ],
          "defaultStatus": "affected",
          "packageName": "keycloak-services",
          "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:red_hat_single_sign_on:7"
          ],
          "defaultStatus": "affected",
          "packageName": "keycloak-services",
          "product": "Red Hat Single Sign-On 7",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client \u201cEnabled\u201d setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources."
    },
    {
      "lang": "es",
      "value": "Se identific\u00f3 una vulnerabilidad en el endpoint de autenticaci\u00f3n Docker v2 de Keycloak, donde los tokens contin\u00faan siendo emitidos incluso despu\u00e9s de que un cliente de registro Docker haya sido deshabilitado administrativamente. Esto significa que al cambiar la configuraci\u00f3n \u0027Enabled\u0027 del cliente a OFF no se impide completamente el acceso. Como resultado, las credenciales previamente v\u00e1lidas a\u00fan pueden ser utilizadas para obtener tokens de autenticaci\u00f3n. Esto debilita los controles administrativos y podr\u00eda permitir un acceso no intencionado a los recursos del registro de contenedores."
    }
  ],
  "id": "CVE-2026-2733",
  "lastModified": "2026-06-17T10:31:37.293",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.8,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 2.5,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2733",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-19T21:31:08.199908Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-19T08:16:17.980",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:3947"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:3948"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-2733"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440895"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-FJF4-6F34-W64Q

Vulnerability from github – Published: 2026-02-19 18:31 – Updated: 2026-03-06 00:31

Summary

Keycloak: Missing Check on Disabled Client for Docker Registry Protocol

Details

Severity

3.8 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "26.5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-2733"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-19T22:06:37Z",
    "nvd_published_at": "2026-02-19T08:16:17Z",
    "severity": "LOW"
  },
  "details": "A flaw was identified in the Docker v2 authentication endpoint of Keycloak, where tokens continue to be issued even after a Docker registry client has been administratively disabled. This means that turning the client \u201cEnabled\u201d setting to OFF does not fully prevent access. As a result, previously valid credentials can still be used to obtain authentication tokens. This weakens administrative controls and could allow unintended access to container registry resources.",
  "id": "GHSA-fjf4-6f34-w64q",
  "modified": "2026-03-06T00:31:28Z",
  "published": "2026-02-19T18:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2733"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/issues/46462"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/743ac24081b2c6da36aac3775147ec5b80c2861e"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3947"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:3948"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-2733"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440895"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak: Missing Check on Disabled Client for Docker Registry Protocol"
}

RHSA-2026:3947

Vulnerability from csaf_redhat - Published: 2026-03-05 19:07 - Updated: 2026-08-31 01:59

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Update

Severity

Important

Scope

8 vulnerabilities in this advisory, including CVE-2026-2733.

CVE-2026-2733

3.8 (Low)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:3947

Open the full advisory

RHSA-2026:3948

Vulnerability from csaf_redhat - Published: 2026-03-05 19:09 - Updated: 2026-08-31 01:59

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.10 Images Update

Severity

Important

Scope

8 vulnerabilities in this advisory, including CVE-2026-2733.

CVE-2026-2733

3.8 (Low)


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

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2026:3948

Open the full advisory

WID-SEC-W-2026-0454

Vulnerability from csaf_certbund - Published: 2026-02-18 23:00 - Updated: 2026-03-05 23:00

Summary

Keycloak: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Severity

Niedrig

Scope

1 vulnerability in this advisory, including CVE-2026-2733.

CVE-2026-2733

Known affected: 2 products

Open the full advisory

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.

Action not permitted

CVE-2026-2733 (GCVE-0-2026-2733)

FKIE_CVE-2026-2733

GHSA-FJF4-6F34-W64Q

RHSA-2026:3947

RHSA-2026:3948

WID-SEC-W-2026-0454

Tags

Sightings

Nomenclature