NCSC-2026-0078

Vulnerability from csaf_ncscnl - Published: 2026-03-05 09:36 - Updated: 2026-03-05 09:36
Summary
Kwetsbaarheden verholpen in Kibana

Notes

The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten
Elastic heeft kwetsbaarheden verholpen in Kibana.
Interpretaties
De kwetsbaarheden bevinden zich in verschillende componenten van Kibana. Een geauthenticeerde gebruiker met alleen weergaveprivileges kan een fout in de invoervalidatie misbruiken om een Denial of Service-voorwaarde te veroorzaken door speciaal vervaardigde, verkeerd gevormde payloads te verzenden. Dit leidt tot overmatig gebruik van resources en kan resulteren in crashes. Daarnaast bevat de zoekendpoint van Kibana's interne Content Connectors een kwetsbaarheid die het mogelijk maakt voor aanvallers om gemanipuleerde invoergegevens te leveren, wat ook kan leiden tot een Denial of Service. De AI Inference Anonymization Engine maakt gebruik van een inefficiënt geconstrueerde reguliere expressie, wat kan worden misbruikt om een Denial of Service te veroorzaken door de regex-processor te overweldigen. De Timelion-component kan ook worden misbruikt om ongecontroleerd middelenverbruik te veroorzaken, wat de beschikbaarheid van de Kibana-service beïnvloedt. Ten slotte staat de kwetsbaarheid in de workflow template engine geauthenticeerde gebruikers met executeWorkflow-rechten toe om code in te voegen die willekeurige bestanden van het serversysteem kan lezen en server-side request forgery (SSRF) aanvallen mogelijk maakt.
Oplossingen
Elastic heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans
medium
Schade
high
CWE-20
Improper Input Validation
CWE-400
Uncontrolled Resource Consumption
CWE-1284
Improper Validation of Specified Quantity in Input
CWE-1333
Inefficient Regular Expression Complexity
CWE-1336
Improper Neutralization of Special Elements Used in a Template Engine
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{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "Elastic heeft kwetsbaarheden verholpen in Kibana.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden bevinden zich in verschillende componenten van Kibana. Een geauthenticeerde gebruiker met alleen weergaveprivileges kan een fout in de invoervalidatie misbruiken om een Denial of Service-voorwaarde te veroorzaken door speciaal vervaardigde, verkeerd gevormde payloads te verzenden. Dit leidt tot overmatig gebruik van resources en kan resulteren in crashes. Daarnaast bevat de zoekendpoint van Kibana\u0027s interne Content Connectors een kwetsbaarheid die het mogelijk maakt voor aanvallers om gemanipuleerde invoergegevens te leveren, wat ook kan leiden tot een Denial of Service. De AI Inference Anonymization Engine maakt gebruik van een ineffici\u00ebnt geconstrueerde reguliere expressie, wat kan worden misbruikt om een Denial of Service te veroorzaken door de regex-processor te overweldigen. De Timelion-component kan ook worden misbruikt om ongecontroleerd middelenverbruik te veroorzaken, wat de beschikbaarheid van de Kibana-service be\u00efnvloedt. Ten slotte staat de kwetsbaarheid in de workflow template engine geauthenticeerde gebruikers met executeWorkflow-rechten toe om code in te voegen die willekeurige bestanden van het serversysteem kan lezen en server-side request forgery (SSRF) aanvallen mogelijk maakt.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "Elastic heeft updates uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
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        "text": "medium",
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        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Improper Input Validation",
        "title": "CWE-20"
      },
      {
        "category": "general",
        "text": "Uncontrolled Resource Consumption",
        "title": "CWE-400"
      },
      {
        "category": "general",
        "text": "Improper Validation of Specified Quantity in Input",
        "title": "CWE-1284"
      },
      {
        "category": "general",
        "text": "Inefficient Regular Expression Complexity",
        "title": "CWE-1333"
      },
      {
        "category": "general",
        "text": "Improper Neutralization of Special Elements Used in a Template Engine",
        "title": "CWE-1336"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
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    "references": [
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        "url": "https://discuss.elastic.co/t/kibana-8-19-11-9-2-5-security-update-esa-2026-14/385250"
      },
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      },
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      },
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      },
      {
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        "summary": "Reference",
        "url": "https://discuss.elastic.co/t/kibana-9-3-1-security-update-esa-2026-17/385253"
      }
    ],
    "title": "Kwetsbaarheden verholpen in Kibana",
    "tracking": {
      "current_release_date": "2026-03-05T09:36:49.056247Z",
      "generator": {
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          "category": "description",
          "text": "An authenticated user with view-only privileges can exploit improper input validation in Kibana to cause Denial of Service by sending malformed payloads that result in excessive resource consumption and application crashes.",
          "title": "Summary"
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            "version": "3.1"
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          "title": "Summary"
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          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-26937.json"
        }
      ],
      "scores": [
        {
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            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-26937"
    },
    {
      "cve": "CVE-2026-26938",
      "cwe": {
        "id": "CWE-1336",
        "name": "Improper Neutralization of Special Elements Used in a Template Engine"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Special Elements Used in a Template Engine",
          "title": "CWE-1336"
        },
        {
          "category": "description",
          "text": "A vulnerability in Kibana\u0027s workflow template engine (CWE-1336) enables authenticated users with executeWorkflow privileges to read arbitrary server files and conduct SSRF attacks through code injection.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-26938 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-26938.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-26938"
    }
  ]
}


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Sightings

Author Source Type Date

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.
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  • 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.