WID-SEC-W-2026-0977

Vulnerability from csaf_certbund - Published: 2026-04-06 22:00 - Updated: 2026-06-10 22:00
Summary
Keycloak: Mehrere Schwachstellen
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: Keycloak ermöglicht Single Sign-On mit Identity and Access Management für moderne Anwendungen und Dienste.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Daten zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.
Betroffene Betriebssysteme: - Linux - UNIX
CVE-2026-1002
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
CVE-2026-3872
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
CVE-2026-4282
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
CVE-2026-4325
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
CVE-2026-4634
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
CVE-2026-4636
Affected products
Product Identifier Version Remediation
Open Source Keycloak <26.5.7
Open Source / Keycloak
 <26.5.7
Red Hat Enterprise Linux
Red Hat
 cpe:/o:redhat:enterprise_linux:- —
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Keycloak erm\u00f6glicht Single Sign-On mit Identity and Access Management f\u00fcr moderne Anwendungen und Dienste.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein Angreifer kann mehrere Schwachstellen in Keycloak ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren, um Informationen offenzulegen, um Daten zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0977 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0977.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0977 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0977"
      },
      {
        "category": "external",
        "summary": "Keycloak 26.5.7 release notes vom 2026-04-06",
        "url": "https://www.keycloak.org/2026/04/keycloak-2657-released"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 45569 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/45569"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 47718 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/47718"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-cjm2-j6cm-6p6m vom 2026-04-06",
        "url": "https://github.com/advisories/GHSA-cjm2-j6cm-6p6m"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 47719 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/47719"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-hj93-h7pg-fh6v vom 2026-04-06",
        "url": "https://github.com/advisories/GHSA-hj93-h7pg-fh6v"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 47715 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/47715"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-rx66-hj7g-28h7 vom 2026-04-06",
        "url": "https://github.com/advisories/GHSA-rx66-hj7g-28h7"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 47716 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/47716"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-h4wv-g838-66g3 vom 2026-04-06",
        "url": "https://github.com/advisories/GHSA-h4wv-g838-66g3"
      },
      {
        "category": "external",
        "summary": "Keycloak GitHub Issue 47717 vom 2026-04-06",
        "url": "https://github.com/keycloak/keycloak/issues/47717"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-f2hx-5fx3-hmcv vom 2026-04-06",
        "url": "https://github.com/advisories/GHSA-f2hx-5fx3-hmcv"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:6477 vom 2026-04-02",
        "url": "https://access.redhat.com/errata/RHSA-2026:6477"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:6475 vom 2026-04-02",
        "url": "https://access.redhat.com/errata/RHSA-2026:6475"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:6476 vom 2026-04-02",
        "url": "https://access.redhat.com/errata/RHSA-2026:6476"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:6478 vom 2026-04-02",
        "url": "https://access.redhat.com/errata/RHSA-2026:6478"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:7380 vom 2026-04-15",
        "url": "https://access.redhat.com/errata/RHSA-2026:7380"
      },
      {
        "category": "external",
        "summary": "Red Hat Security Advisory RHSA-2026:25089 vom 2026-06-10",
        "url": "https://access.redhat.com/errata/RHSA-2026:25089"
      }
    ],
    "source_lang": "en-US",
    "title": "Keycloak: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-06-10T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-11T10:52:31.852+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-0977",
      "initial_release_date": "2026-04-06T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-06T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-04-14T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Red Hat aufgenommen"
        },
        {
          "date": "2026-06-10T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Red Hat aufgenommen"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c26.5.7",
                "product": {
                  "name": "Open Source Keycloak \u003c26.5.7",
                  "product_id": "T052429"
                }
              },
              {
                "category": "product_version",
                "name": "26.5.7",
                "product": {
                  "name": "Open Source Keycloak 26.5.7",
                  "product_id": "T052429-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:keycloak:keycloak:26.5.7"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Keycloak"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Red Hat Enterprise Linux",
            "product": {
              "name": "Red Hat Enterprise Linux",
              "product_id": "67646",
              "product_identification_helper": {
                "cpe": "cpe:/o:redhat:enterprise_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-1002",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-1002"
    },
    {
      "cve": "CVE-2026-3872",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-3872"
    },
    {
      "cve": "CVE-2026-4282",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-4282"
    },
    {
      "cve": "CVE-2026-4325",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-4325"
    },
    {
      "cve": "CVE-2026-4634",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-4634"
    },
    {
      "cve": "CVE-2026-4636",
      "product_status": {
        "known_affected": [
          "T052429",
          "67646"
        ]
      },
      "release_date": "2026-04-06T22:00:00.000+00:00",
      "title": "CVE-2026-4636"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.