Vulnerability-Lookup

CVE-2026-14781 (GCVE-0-2026-14781)

Vulnerability from cvelistv5 – Published: 2026-07-05 06:55 – Updated: 2026-07-06 14:12

Title

Keycloak-services: keycloak-services: oidc email_verified claim incorrectly applied to userinfo email

Summary

A flaw exists in the org.keycloak.broker.oidc package where the OIDC broker incorrectly synchronizes the email_verified claim. When an OIDC identity provider is configured with trustEmail=true and the userinfo endpoint is enabled, Keycloak retrieves the email address from the userinfo response but retrieves the email_verified status exclusively from the id_token. The root cause is a lack of validation ensuring that the email_verified claim in the id_token actually refers to the email address returned by the userinfo endpoint. If these two sources return different email addresses, the id_token's email_verified=true claim is blindly applied to the userinfo email. Exploitation Conditions: The OIDC identity provider must have trustEmail set to true (non-default). The userinfo endpoint must be enabled (default). The attacker must control or have compromised the upstream OIDC provider. Concrete Impact: Mark arbitrary email addresses as verified in the Keycloak database. Bypass email-based security controls or verification workflows. Potential account takeover if the application relies solely on the email_verified flag from the IdP to link accounts.

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/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 2026-07-06 14:11 UTC

CWE

CWE-1288 - Improper Validation of Consistency within Input

Assigner

redhat redhat root Scorecard

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-14781	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2497118	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Build of Keycloak	cpe:/a:redhat:build_keycloak:
Red Hat	Red Hat Data Grid 8	cpe:/a:redhat:jboss_data_grid: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

2026-07-05 06:49

Credits

Red Hat would like to thank Kevin Bozell for reporting this issue.

Show details on NVD website

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CNVD-2026-27675

Vulnerability from cnvd - Published: 2026-07-14

Title

Keycloak输入验证错误漏洞

Description

Keycloak是Keycloak组织开源的一种开源身份和访问管理解决方案。 Keycloak存在输入验证错误漏洞。该漏洞源于OIDC代理在同步email_verified声明时缺乏验证，攻击者可利用该漏洞将任意电子邮件地址标记为已验证，绕过基于电子邮件的安全控制或验证工作流，以及潜在的账户接管。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.keycloak.org/security/advisories

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-14781

Impacted products

Name
Keycloak Keycloak

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-14781",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-14781"
    }
  },
  "description": "Keycloak\u662fKeycloak\u7ec4\u7ec7\u5f00\u6e90\u7684\u4e00\u79cd\u5f00\u6e90\u8eab\u4efd\u548c\u8bbf\u95ee\u7ba1\u7406\u89e3\u51b3\u65b9\u6848\u3002\n\nKeycloak\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8eOIDC\u4ee3\u7406\u5728\u540c\u6b65email_verified\u58f0\u660e\u65f6\u7f3a\u4e4f\u9a8c\u8bc1\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u4efb\u610f\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u6807\u8bb0\u4e3a\u5df2\u9a8c\u8bc1\uff0c\u7ed5\u8fc7\u57fa\u4e8e\u7535\u5b50\u90ae\u4ef6\u7684\u5b89\u5168\u63a7\u5236\u6216\u9a8c\u8bc1\u5de5\u4f5c\u6d41\uff0c\u4ee5\u53ca\u6f5c\u5728\u7684\u8d26\u6237\u63a5\u7ba1\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.keycloak.org/security/advisories",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-27675",
  "openTime": "2026-07-14",
  "products": {
    "product": "Keycloak Keycloak"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-14781",
  "serverity": "\u4e2d",
  "submitTime": "2026-07-08",
  "title": "Keycloak\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

EUVD-2026-333306

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:51

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:51:00.245289+00:00",
  "id": "EUVD-2026-333306"
}

FKIE_CVE-2026-14781

Vulnerability from fkie_nvd - Published: 2026-07-05 07:16 - Updated: 2026-08-11 01:13

Severity

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

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-14781	Vendor Advisory
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2497118	Issue Tracking, Vendor Advisory

Impacted products

	Vendor	Product	Version
	redhat	build_of_keycloak	-

JSON

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{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:build_keycloak:"
          ],
          "defaultStatus": "unaffected",
          "packageName": "keycloak-services",
          "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",
          "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": "unaffected",
          "packageName": "rhbk-openshift-rhel9/rhbk-openshift-rhel9",
          "product": "Red Hat Build of Keycloak",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:jboss_data_grid:8"
          ],
          "defaultStatus": "unaffected",
          "packageName": "keycloak-services",
          "product": "Red Hat Data Grid 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
          "cpes": [
            "cpe:/a:redhat:jbosseapxp"
          ],
          "defaultStatus": "unaffected",
          "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": "unaffected",
          "packageName": "keycloak-services",
          "product": "Red Hat Single Sign-On 7",
          "vendor": "Red Hat"
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:redhat:build_of_keycloak:-:*:*:*:-:*:*:*",
              "matchCriteriaId": "E5C930CB-4EAD-497B-A44B-D880F2A1F85B",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw exists in the org.keycloak.broker.oidc package where the OIDC broker incorrectly synchronizes the email_verified claim. When an OIDC identity provider is configured with trustEmail=true and the userinfo endpoint is enabled, Keycloak retrieves the email address from the userinfo response but retrieves the email_verified status exclusively from the id_token.\nThe root cause is a lack of validation ensuring that the email_verified claim in the id_token actually refers to the email address returned by the userinfo endpoint. If these two sources return different email addresses, the id_token\u0027s email_verified=true claim is blindly applied to the userinfo email.\nExploitation Conditions:\nThe OIDC identity provider must have trustEmail set to true (non-default).\n\nThe userinfo endpoint must be enabled (default).\n\nThe attacker must control or have compromised the upstream OIDC provider.\n\n\nConcrete Impact:\nMark arbitrary email addresses as verified in the Keycloak database.\n\nBypass email-based security controls or verification workflows.\n\nPotential account takeover if the application relies solely on the email_verified flag from the IdP to link accounts."
    }
  ],
  "id": "CVE-2026-14781",
  "lastModified": "2026-08-11T01:13:00.727",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-14781",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-06T14:11:53.137626Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-05T07:16:39.820",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-14781"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497118"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1288"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}

GHSA-C96P-56GH-3PVW

Vulnerability from github – Published: 2026-07-05 09:30 – Updated: 2026-07-05 09:30

Details

The userinfo endpoint must be enabled (default).

The attacker must control or have compromised the upstream OIDC provider.

Concrete Impact: Mark arbitrary email addresses as verified in the Keycloak database.

Bypass email-based security controls or verification workflows.

Potential account takeover if the application relies solely on the email_verified flag from the IdP to link accounts.

Severity

4.8 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-14781"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1288"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-05T07:16:39Z",
    "severity": "MODERATE"
  },
  "details": "A flaw exists in the org.keycloak.broker.oidc package where the OIDC broker incorrectly synchronizes the email_verified claim. When an OIDC identity provider is configured with trustEmail=true and the userinfo endpoint is enabled, Keycloak retrieves the email address from the userinfo response but retrieves the email_verified status exclusively from the id_token.\nThe root cause is a lack of validation ensuring that the email_verified claim in the id_token actually refers to the email address returned by the userinfo endpoint. If these two sources return different email addresses, the id_token\u0027s email_verified=true claim is blindly applied to the userinfo email.\nExploitation Conditions:\nThe OIDC identity provider must have trustEmail set to true (non-default).\n\nThe userinfo endpoint must be enabled (default).\n\nThe attacker must control or have compromised the upstream OIDC provider.\n\n\nConcrete Impact:\nMark arbitrary email addresses as verified in the Keycloak database.\n\nBypass email-based security controls or verification workflows.\n\nPotential account takeover if the application relies solely on the email_verified flag from the IdP to link accounts.",
  "id": "GHSA-c96p-56gh-3pvw",
  "modified": "2026-07-05T09:30:23Z",
  "published": "2026-07-05T09:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-14781"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-14781"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2497118"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2026-2198

Vulnerability from csaf_certbund - Published: 2026-07-05 22:00 - Updated: 2026-09-30 22:00

Summary

Keycloak: Mehrere Schwachstellen

Severity

Mittel

Scope

4 vulnerabilities in this advisory, including CVE-2026-14781.

CVE-2026-14781

Known affected: 5 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.

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-2026-14781 (GCVE-0-2026-14781)

CNVD-2026-27675

EUVD-2026-333306

FKIE_CVE-2026-14781

GHSA-C96P-56GH-3PVW

WID-SEC-W-2026-2198

Tags

Sightings

Nomenclature

Related by attack behaviour