Vulnerability-Lookup

CVE-2026-37978 (GCVE-0-2026-37978)

Vulnerability from cvelistv5 – Published: 2026-05-19 10:52 – Updated: 2026-05-20 16:08

Title

Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api

Summary

A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.

Severity

4.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-19 12:23 UTC

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

redhat redhat root

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-2026-37978	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455327	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

2026-05-19 10:43

Show details on NVD website

JSON

To clipboard

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bit-keycloak-2026-37978

Vulnerability from bitnami_vulndb

Published

2026-08-25 11:42

Modified

2026-09-08 08:34

Summary

Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "keycloak",
        "purl": "pkg:bitnami/keycloak"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.4.12"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-37978"
  ],
  "database_specific": {
    "cpes": [
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    "severity": "Medium"
  },
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  "id": "BIT-keycloak-2026-37978",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-08-25T11:42:18.839Z",
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      "url": "https://access.redhat.com/errata/RHSA-2026:19596"
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    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-37978"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api"
}

FKIE_CVE-2026-37978

Vulnerability from fkie_nvd - Published: 2026-05-19 12:16 - Updated: 2026-06-17 10:41

Severity

4.9 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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-2026-37978	Vendor Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2455327	Vendor Advisory

Impacted products

	Vendor	Product	Version
	redhat	build_of_keycloak	*

JSON

To clipboard

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        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F167CED9-6F3C-4C5F-BF3B-D8944F844345",
              "versionEndExcluding": "26.4.12",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. A low-privilege administrator with the \u0027view-clients\u0027 role can exploit this by invoking the \u0027evaluate-scopes\u0027 Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API."
    }
  ],
  "id": "CVE-2026-37978",
  "lastModified": "2026-06-17T10:41:39.480",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 3.6,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-37978",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-19T12:23:30.773288Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-19T12:16:17.540",
  "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-2026-37978"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455327"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-RRV7-3MQF-HXFR

Vulnerability from github – Published: 2026-05-19 12:31 – Updated: 2026-06-04 15:33

Summary

Keycloak: Information Disclosure via evaluate-scopes Admin API

Details

Severity

4.9 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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-2026-37978"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T15:26:30Z",
    "nvd_published_at": "2026-05-19T12:16:17Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in Keycloak. A low-privilege administrator with the \u0027view-clients\u0027 role can exploit this by invoking the \u0027evaluate-scopes\u0027 Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.",
  "id": "GHSA-rrv7-3mqf-hxfr",
  "modified": "2026-06-04T15:33:01Z",
  "published": "2026-05-19T12:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-37978"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/492d1f04cdad425dadb9d5e1faa94dd17a875573"
    },
    {
      "type": "WEB",
      "url": "https://github.com/keycloak/keycloak/commit/ba9a18744dcec2ef46f284d25c1c0aa1c962a500"
    },
    {
      "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-2026-37978"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455327"
    },
    {
      "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:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Keycloak: Information Disclosure via evaluate-scopes Admin API"
}

RHSA-2026:19596

Vulnerability from csaf_redhat - Published: 2026-05-20 11:23 - Updated: 2026-09-04 16:25

Summary

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

Severity

Important

Scope

10 vulnerabilities in this advisory, including CVE-2026-37978.

CVE-2026-37978

4.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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: 2026-08-31 02:00

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-2026-37978.

CVE-2026-37978

4.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/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-2026-37978.

CVE-2026-37978

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-2026-37978 (GCVE-0-2026-37978)

bit-keycloak-2026-37978

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-37978

GHSA-RRV7-3MQF-HXFR

RHSA-2026:19596

RHSA-2026:19597

WID-SEC-W-2026-1612

Tags

Sightings

Nomenclature