Vulnerability-Lookup

CVE-2026-4630 (GCVE-0-2026-4630)

Vulnerability from cvelistv5 – Published: 2026-05-19 10:28 – Updated: 2026-05-20 16:08

Title

Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference

Summary

A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.

Severity

6.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-19 16:33 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1082 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:19596	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19597	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4630	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2450245	issue-trackingx_refsource_REDHAT

Impacted products

3 products

Vendor	Product	Version
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4.12-1 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4	Unaffected: 26.4-17 , < * (rpm) cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat	Red Hat build of Keycloak 26.4.12	cpe:/a:redhat:build_keycloak:26.4::el9

Date Public

2026-04-15 12:34

Show details on NVD website

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        "datePublished": "2026-05-19T10:28:15.936Z",
        "dateReserved": "2026-03-23T08:12:45.479Z",
        "dateUpdated": "2026-05-20T16:08:47.221Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

bit-keycloak-2026-4630

Vulnerability from bitnami_vulndb

Published

2026-08-25 11:42

Modified

2026-09-08 08:34

Summary

Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "keycloak",
        "purl": "pkg:bitnami/keycloak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "26.4.0"
            },
            {
              "fixed": "26.4.12"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4630"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource\u0027s unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.",
  "id": "BIT-keycloak-2026-4630",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-08-25T11:42:29.130Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4630"
    },
    {
      "type": "ADVISORY",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450245"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4630"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Keycloak: keycloak: unauthorized resource access and data modification via insecure direct object reference"
}

FKIE_CVE-2026-4630

Vulnerability from fkie_nvd - Published: 2026-05-19 12:16 - Updated: 2026-10-26 20:10

Severity

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

Summary

References

URL	Tags
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19596	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/errata/RHSA-2026:19597	Vendor Advisory
secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-4630	Vendor Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2450245	Vendor Advisory

Impacted products

	Vendor	Product	Version
	redhat	build_of_keycloak	*

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": "26.4.12-1",
              "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": "26.4-17",
              "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": "26.4-17",
              "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 26.4.12",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E71FD53F-2C05-4B84-9BEE-BB287017B322",
              "versionEndExcluding": "26.4.12",
              "versionStartIncluding": "26.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. An authenticated client could exploit an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource\u0027s unique identifier (UUID) belonging to another Resource Server within the same realm, the client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en Keycloak. Un cliente autenticado podr\u00eda explotar una vulnerabilidad de Referencia Directa a Objeto Insegura (IDOR) en el endpoint de la API de Protecci\u00f3n de Servicios de Autorizaci\u00f3n. Al conocer u obtener el identificador \u00fanico (UUID) de un recurso perteneciente a otro servidor de recursos dentro del mismo reino, el cliente podr\u00eda eludir las comprobaciones de autorizaci\u00f3n. Esto permite al cliente realizar operaciones GET, PUT y DELETE no autorizadas en los recursos, lo que lleva a la revelaci\u00f3n de informaci\u00f3n y a la posible modificaci\u00f3n o eliminaci\u00f3n no autorizada de datos."
    }
  ],
  "id": "CVE-2026-4630",
  "lastModified": "2026-10-26T20:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.2,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4630",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-19T16:33:12.614371Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-19T12:16:19.290",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-4630"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450245"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-C739-F6XW-6PV2

Vulnerability from github – Published: 2026-05-19 12:31 – Updated: 2026-06-30 19:16

Summary

Keycloak Protection API allows authenticated clients to access and modify resources owned by other Resource Servers

Details

Keycloak's Authorization Services feature exposes a User-Managed Access Protection API that include an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource's unique identifier (UUID) belonging to another Resource Server within the same realm, an authenticated client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.

Severity

6.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.keycloak:keycloak-services"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4630"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T19:16:10Z",
    "nvd_published_at": "2026-05-19T12:16:19Z",
    "severity": "MODERATE"
  },
  "details": "Keycloak\u0027s Authorization Services feature exposes a User-Managed Access Protection API that include an Insecure Direct Object Reference (IDOR) vulnerability in the Authorization Services Protection API endpoint. By knowing or obtaining a resource\u0027s unique identifier (UUID) belonging to another Resource Server within the same realm, an authenticated client could bypass authorization checks. This allows the client to perform unauthorized GET, PUT, and DELETE operations on resources, leading to information disclosure and potential unauthorized modification or deletion of data.",
  "id": "GHSA-c739-f6xw-6pv2",
  "modified": "2026-06-30T19:16:10Z",
  "published": "2026-05-19T12:31:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4630"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/issues/49115"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/pull/49121"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/0cea089bd19f5061f5fd47099fd6fb41a17d8c55"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/1192267af8f16a7b722bdc2abbd3410c477388aa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/4e9b17cbedb828b4afc6b62399eee317d4735234"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19597"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-4630"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2450245"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/keycloak/keycloak"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak Protection API allows authenticated clients to access and modify resources owned by other Resource Servers"
}

RHSA-2026:19596

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-10-29 09:30

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.12 Security Update

Severity

Important

Scope

14 vulnerabilities in this advisory, including CVE-2026-4630.

CVE-2026-4630

6.8 (Medium)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:19596

Open the full advisory

RHSA-2026:19597

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-10-29 09:30

Summary

Red Hat Security Advisory: Red Hat build of Keycloak 26.4.12 Images Security Update

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-4630.

CVE-2026-4630

6.8 (Medium)


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

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2026:19597

Open the full advisory

WID-SEC-W-2026-1612

Vulnerability from csaf_certbund - Published: 2026-05-19 22:00 - Updated: 2026-05-19 22:00

Summary

Keycloak: Mehrere Schwachstellen

Severity

Hoch

Scope

9 vulnerabilities in this advisory, including CVE-2026-4630.

CVE-2026-4630

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

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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.

Action not permitted

CVE-2026-4630 (GCVE-0-2026-4630)

bit-keycloak-2026-4630

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-4630

GHSA-C739-F6XW-6PV2

RHSA-2026:19596

RHSA-2026:19597

WID-SEC-W-2026-1612

Tags

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Nomenclature

Vulnerability timeline

Related by attack behaviour