WID-SEC-W-2026-1050

Vulnerability from csaf_certbund - Published: 2026-04-09 22:00 - Updated: 2026-04-09 22:00
Summary
Checkmk: Mehrere Schwachstellen
Severity
Mittel
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: Checkmk ist eine IT-Monitoring-Software.
Angriff: Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Checkmk ausnutzen, nicht näher spezifizierte Auswirkungen zu erzielen.
Betroffene Betriebssysteme: - Sonstiges - UNIX
CVE-2026-33455
Affected products
Product Identifier Version Remediation
Checkmk Checkmk <2.3.0p47
Checkmk / Checkmk
 <2.3.0p47
Checkmk Checkmk <2.5.0b4
Checkmk / Checkmk
 <2.5.0b4
Checkmk Checkmk <2.4.0p26
Checkmk / Checkmk
 <2.4.0p26
Checkmk Checkmk <2.6.0b1
Checkmk / Checkmk
 <2.6.0b1
CVE-2026-33456
Affected products
Product Identifier Version Remediation
Checkmk Checkmk <2.3.0p47
Checkmk / Checkmk
 <2.3.0p47
Checkmk Checkmk <2.5.0b4
Checkmk / Checkmk
 <2.5.0b4
Checkmk Checkmk <2.4.0p26
Checkmk / Checkmk
 <2.4.0p26
Checkmk Checkmk <2.6.0b1
Checkmk / Checkmk
 <2.6.0b1
CVE-2026-33457
Affected products
Product Identifier Version Remediation
Checkmk Checkmk <2.3.0p47
Checkmk / Checkmk
 <2.3.0p47
Checkmk Checkmk <2.5.0b4
Checkmk / Checkmk
 <2.5.0b4
Checkmk Checkmk <2.4.0p26
Checkmk / Checkmk
 <2.4.0p26
Checkmk Checkmk <2.6.0b1
Checkmk / Checkmk
 <2.6.0b1
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "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": "Checkmk ist eine IT-Monitoring-Software.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Checkmk ausnutzen, nicht n\u00e4her spezifizierte Auswirkungen zu erzielen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\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-2026-1050 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1050.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1050 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1050"
      },
      {
        "category": "external",
        "summary": "CheckMK Wek #17988 vom 2026-04-09",
        "url": "https://checkmk.com/werk/17988"
      },
      {
        "category": "external",
        "summary": "CheckMK Wek #17989 vom 2026-04-09",
        "url": "https://checkmk.com/werk/17989"
      },
      {
        "category": "external",
        "summary": "CheckMK Wek #17990 vom 2026-04-09",
        "url": "https://checkmk.com/werk/17990"
      },
      {
        "category": "external",
        "summary": "EU Vulnerability Database EUVD-2026-21342",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-21342"
      },
      {
        "category": "external",
        "summary": "EU Vulnerability Database EUVD-2026-21344",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-21344"
      },
      {
        "category": "external",
        "summary": "EU Vulnerability Database EUVD-2026-21346",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-21346"
      }
    ],
    "source_lang": "en-US",
    "title": "Checkmk: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-04-09T22:00:00.000+00:00",
      "generator": {
        "date": "2026-04-10T11:34:18.067+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-1050",
      "initial_release_date": "2026-04-09T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-04-09T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.6.0b1",
                "product": {
                  "name": "Checkmk Checkmk \u003c2.6.0b1",
                  "product_id": "T052651"
                }
              },
              {
                "category": "product_version",
                "name": "2.6.0b1",
                "product": {
                  "name": "Checkmk Checkmk 2.6.0b1",
                  "product_id": "T052651-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:checkmk:checkmk:2.6.0b1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.5.0b4",
                "product": {
                  "name": "Checkmk Checkmk \u003c2.5.0b4",
                  "product_id": "T052652"
                }
              },
              {
                "category": "product_version",
                "name": "2.5.0b4",
                "product": {
                  "name": "Checkmk Checkmk 2.5.0b4",
                  "product_id": "T052652-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:checkmk:checkmk:2.5.0b4"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.4.0p26",
                "product": {
                  "name": "Checkmk Checkmk \u003c2.4.0p26",
                  "product_id": "T052653"
                }
              },
              {
                "category": "product_version",
                "name": "2.4.0p26",
                "product": {
                  "name": "Checkmk Checkmk 2.4.0p26",
                  "product_id": "T052653-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:checkmk:checkmk:2.4.0p26"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.3.0p47",
                "product": {
                  "name": "Checkmk Checkmk \u003c2.3.0p47",
                  "product_id": "T052654"
                }
              },
              {
                "category": "product_version",
                "name": "2.3.0p47",
                "product": {
                  "name": "Checkmk Checkmk 2.3.0p47",
                  "product_id": "T052654-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:checkmk:checkmk:2.3.0p47"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Checkmk"
          }
        ],
        "category": "vendor",
        "name": "Checkmk"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-33455",
      "product_status": {
        "known_affected": [
          "T052654",
          "T052652",
          "T052653",
          "T052651"
        ]
      },
      "release_date": "2026-04-09T22:00:00.000+00:00",
      "title": "CVE-2026-33455"
    },
    {
      "cve": "CVE-2026-33456",
      "product_status": {
        "known_affected": [
          "T052654",
          "T052652",
          "T052653",
          "T052651"
        ]
      },
      "release_date": "2026-04-09T22:00:00.000+00:00",
      "title": "CVE-2026-33456"
    },
    {
      "cve": "CVE-2026-33457",
      "product_status": {
        "known_affected": [
          "T052654",
          "T052652",
          "T052653",
          "T052651"
        ]
      },
      "release_date": "2026-04-09T22:00:00.000+00:00",
      "title": "CVE-2026-33457"
    }
  ]
}


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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

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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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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