CVE-2026-23938 (GCVE-0-2026-23938)

Vulnerability from cvelistv5 – Published: 2026-08-18 12:20 – Updated: 2026-08-18 13:34
VLAI
Title
Server DoS via JavaScript preprocessing or script items
Summary
An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.
Severity
2.1 (Low)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 12:50 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Zabbix Zabbix Affected: 6.0.0 , ≤ 6.0.46 (git)
Affected: 7.0.0 , ≤ 7.0.26 (git)
Affected: 7.4.0 , ≤ 7.4.10 (git)
Create a notification for this product.
Credits
Zabbix wants to thank mjlx for submitting this report on the HackerOne bug bounty platform.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23938",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T12:50:54.884470Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T13:34:38.081Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "Server",
            "Proxy"
          ],
          "product": "Zabbix",
          "repo": "https://git.zabbix.com/",
          "vendor": "Zabbix",
          "versions": [
            {
              "changes": [
                {
                  "at": "6.0.47",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "6.0.46",
              "status": "affected",
              "version": "6.0.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "7.0.27",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.0.26",
              "status": "affected",
              "version": "7.0.0",
              "versionType": "git"
            },
            {
              "changes": [
                {
                  "at": "7.4.11",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "7.4.10",
              "status": "affected",
              "version": "7.4.0",
              "versionType": "git"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn attacker would need access to a regular (non-super) admin account.\u003c/p\u003e"
            }
          ],
          "value": "An attacker would need access to a regular (non-super) admin account."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Zabbix wants to thank mjlx for submitting this report on the HackerOne bug bounty platform."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.\u003c/p\u003e"
            }
          ],
          "value": "An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-153",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-153: Input Data Manipulation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-248",
              "description": "CWE-248: Uncaught Exception",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-18T12:20:52.173Z",
        "orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
        "shortName": "Zabbix"
      },
      "references": [
        {
          "url": "https://support.zabbix.com/browse/ZBX-28075"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
            }
          ],
          "value": "Update the affected components to their respective fixed versions."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Server DoS via JavaScript preprocessing or script items",
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
    "assignerShortName": "Zabbix",
    "cveId": "CVE-2026-23938",
    "datePublished": "2026-08-18T12:20:52.173Z",
    "dateReserved": "2026-01-19T14:03:13.686Z",
    "dateUpdated": "2026-08-18T13:34:38.081Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23938",
      "date": "2026-10-03",
      "epss": "0.00352",
      "percentile": "0.26613"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-23938",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-18T12:50:54.884470Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-18T12:50:56.291Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unknown",
              "modules": [
                "Server",
                "Proxy"
              ],
              "product": "Zabbix",
              "repo": "https://git.zabbix.com/",
              "vendor": "Zabbix",
              "versions": [
                {
                  "changes": [
                    {
                      "at": "6.0.47",
                      "status": "unaffected"
                    }
                  ],
                  "lessThanOrEqual": "6.0.46",
                  "status": "affected",
                  "version": "6.0.0",
                  "versionType": "git"
                },
                {
                  "changes": [
                    {
                      "at": "7.0.27",
                      "status": "unaffected"
                    }
                  ],
                  "lessThanOrEqual": "7.0.26",
                  "status": "affected",
                  "version": "7.0.0",
                  "versionType": "git"
                },
                {
                  "changes": [
                    {
                      "at": "7.4.11",
                      "status": "unaffected"
                    }
                  ],
                  "lessThanOrEqual": "7.4.10",
                  "status": "affected",
                  "version": "7.4.0",
                  "versionType": "git"
                }
              ]
            }
          ],
          "configurations": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eAn attacker would need access to a regular (non-super) admin account.\u003c/p\u003e"
                }
              ],
              "value": "An attacker would need access to a regular (non-super) admin account."
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "reporter",
              "value": "Zabbix wants to thank mjlx for submitting this report on the HackerOne bug bounty platform."
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eAn authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.\u003c/p\u003e"
                }
              ],
              "value": "An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-153",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-153: Input Data Manipulation"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 2.1,
                "baseSeverity": "LOW",
                "exploitMaturity": "NOT_DEFINED",
                "privilegesRequired": "HIGH",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "LOW",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-248",
                  "description": "CWE-248: Uncaught Exception",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-18T12:20:52.173Z",
            "orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
            "shortName": "Zabbix"
          },
          "references": [
            {
              "url": "https://support.zabbix.com/browse/ZBX-28075"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
                }
              ],
              "value": "Update the affected components to their respective fixed versions."
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Server DoS via JavaScript preprocessing or script items",
          "x_generator": {
            "engine": "Vulnogram 1.0.4"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
        "assignerShortName": "Zabbix",
        "cveId": "CVE-2026-23938",
        "datePublished": "2026-08-18T12:20:52.173Z",
        "dateReserved": "2026-01-19T14:03:13.686Z",
        "dateUpdated": "2026-08-18T13:34:38.081Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


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.