Vulnerability-Lookup

GHSA-H55G-WW3M-9HQ9

Vulnerability from github – Published: 2026-03-24 21:31 – Updated: 2026-03-24 21:31

Details

For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information in Zabbix documentation.

Severity ?

7.1 (High)


                  
                    CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23919"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-488"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-24T19:16:49Z",
    "severity": "HIGH"
  },
  "details": "For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information \u003ca href=\u0027https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe\u0027\u003ein Zabbix documentation\u003c/a\u003e.",
  "id": "GHSA-h55g-ww3m-9hq9",
  "modified": "2026-03-24T21:31:23Z",
  "published": "2026-03-24T21:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23919"
    },
    {
      "type": "WEB",
      "url": "https://support.zabbix.com/browse/ZBX-27638"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-23919 (GCVE-0-2026-23919)

Vulnerability from cvelistv5 – Published: 2026-03-24 18:26 – Updated: 2026-04-22 07:06

Title

Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server

Summary

Severity ?

7.1 (High)


                        
                          CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L

CWE

CWE-488 - Exposure of Data Element to Wrong Session

Assigner

Zabbix

References

URL

Tags

https://support.zabbix.com/browse/ZBX-27638

Impacted products

	Vendor	Product	Version
	Zabbix	Zabbix	Affected: 6.0.0 , ≤ 6.0.41 (git) Affected: 7.0.0 , ≤ 7.0.18 (git) Affected: 7.2.0 , ≤ 7.2.12 (git) Affected: 7.4.0 , ≤ 7.4.2 (git)

Credits

Zabbix wants to thank Yerdan (big_john) for submitting this report on the HackerOne bug bounty platform.

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JSON

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                "id": "CVE-2026-23919",
                "options": [
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                  },
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-24T18:36:08.999862Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "vendor": "Zabbix",
          "versions": [
            {
              "changes": [
                {
                  "at": "6.0.42",
                  "status": "unaffected"
                }
              ],
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              "status": "affected",
              "version": "6.0.0",
              "versionType": "git"
            },
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                  "at": "7.0.19",
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              "status": "affected",
              "version": "7.0.0",
              "versionType": "git"
            },
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              "changes": [
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                  "at": "7.2.13",
                  "status": "unaffected"
                }
              ],
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              "status": "affected",
              "version": "7.2.0",
              "versionType": "git"
            },
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                {
                  "at": "7.4.3",
                  "status": "unaffected"
                }
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            }
          ],
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      "credits": [
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          "lang": "en",
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      ],
      "impacts": [
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          "capecId": "CAPEC-124",
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            {
              "lang": "en",
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      ],
      "metrics": [
        {
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            "Recovery": "NOT_DEFINED",
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          "url": "https://support.zabbix.com/browse/ZBX-27638"
        }
      ],
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            }
          ],
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    "datePublished": "2026-03-24T18:26:43.877Z",
    "dateReserved": "2026-01-19T14:02:54.327Z",
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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.
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.

Action not permitted

GHSA-H55G-WW3M-9HQ9

CVE-2026-23919 (GCVE-0-2026-23919)

Tags

Sightings

Nomenclature