CVE-2026-26935 (GCVE-0-2026-26935)

Vulnerability from cvelistv5 – Published: 2026-02-26 17:05 – Updated: 2026-02-26 18:28
VLAI
Title
Improper Input Validation in Kibana Leading to Denial of Service
Summary
Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-26 17:51 UTC
CWE
  • CWE-20 - Improper Input Validation
Assigner
elastic CNA under the mitre root
CNA scorecard C 69/100 over 155 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Elastic Kibana Affected: 9.3.0 , ≤ 9.3.0 (semver)
Affected: 8.4.0 , ≤ 8.19.11 (semver)
Affected: 9.0.0 , ≤ 9.2.5 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26935",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-26T17:51:42.935666Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T18:28:11.607Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kibana",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "9.3.0",
              "status": "affected",
              "version": "9.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.11",
              "status": "affected",
              "version": "8.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.2.5",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eImproper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)\u003c/p\u003e"
            }
          ],
          "value": "Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-153",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-153 Input Data Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-26T17:05:16.619Z",
        "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
        "shortName": "elastic"
      },
      "references": [
        {
          "url": "https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-13/385249"
        }
      ],
      "source": {
        "discovery": "Elastic"
      },
      "title": "Improper Input Validation in Kibana Leading to Denial of Service",
      "x_generator": {
        "engine": "Elastic CVE Publisher 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "cveId": "CVE-2026-26935",
    "datePublished": "2026-02-26T17:05:16.619Z",
    "dateReserved": "2026-02-16T16:42:05.773Z",
    "dateUpdated": "2026-02-26T18:28:11.607Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-26935",
      "date": "2026-10-24",
      "epss": "0.00558",
      "percentile": "0.45795"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Kibana",
                "vendor": "Elastic",
                "versions": [
                  {
                    "lessThanOrEqual": "9.3.0",
                    "status": "affected",
                    "version": "9.3.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "8.19.11",
                    "status": "affected",
                    "version": "8.4.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "9.2.5",
                    "status": "affected",
                    "version": "9.0.0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@elastic.co"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "29B0B2CE-953F-4AD3-A8AC-3643A28586B7",
                    "versionEndExcluding": "8.19.12",
                    "versionStartIncluding": "8.4.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F14ACA8C-46A2-42EF-9F63-AEF657C6736A",
                    "versionEndExcluding": "9.2.6",
                    "versionStartIncluding": "9.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:elastic:kibana:9.3.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6E90DE12-A5EC-4C3C-A86E-BF5AA0778628",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)"
          },
          {
            "lang": "es",
            "value": "Inadecuada validaci\u00f3n de entrada (CWE-20) en el punto final interno de b\u00fasqueda de Content Connectors en Kibana puede conducir a denegaci\u00f3n de servicio mediante manipulaci\u00f3n de datos de entrada (CAPEC-153)"
          }
        ],
        "id": "CVE-2026-26935",
        "lastModified": "2026-06-17T10:26:24.927",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 3.6,
              "source": "security@elastic.co",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-26935",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-26T17:51:42.935666Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-02-26T18:23:07.817",
        "references": [
          {
            "source": "security@elastic.co",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-13/385249"
          }
        ],
        "sourceIdentifier": "security@elastic.co",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              }
            ],
            "source": "security@elastic.co",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T07:57:11+00:00",
      "cve": "CVE-2026-26935",
      "id": "CVE-2026-26935",
      "initial_release_date": "2026-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Improper Input Validation in Kibana Leading to Denial of Service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26935.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-26935",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-02-26T17:51:42.935666Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-02-26T17:53:29.853Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Kibana",
              "vendor": "Elastic",
              "versions": [
                {
                  "lessThanOrEqual": "9.3.0",
                  "status": "affected",
                  "version": "9.3.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.19.11",
                  "status": "affected",
                  "version": "8.4.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "9.2.5",
                  "status": "affected",
                  "version": "9.0.0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eImproper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)\u003c/p\u003e"
                }
              ],
              "value": "Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)"
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-153",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-153 Input Data Manipulation"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-20",
                  "description": "CWE-20 Improper Input Validation",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-02-26T17:05:16.619Z",
            "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
            "shortName": "elastic"
          },
          "references": [
            {
              "url": "https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-13/385249"
            }
          ],
          "source": {
            "discovery": "Elastic"
          },
          "title": "Improper Input Validation in Kibana Leading to Denial of Service",
          "x_generator": {
            "engine": "Elastic CVE Publisher 0.0.1"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
        "assignerShortName": "elastic",
        "cveId": "CVE-2026-26935",
        "datePublished": "2026-02-26T17:05:16.619Z",
        "dateReserved": "2026-02-16T16:42:05.773Z",
        "dateUpdated": "2026-02-26T18:28:11.607Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.