{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23919", "assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8", "state": "PUBLISHED", "assignerShortName": "Zabbix", "dateReserved": "2026-01-19T14:02:54.327Z", "datePublished": "2026-03-24T18:26:43.877Z", "dateUpdated": "2026-04-22T07:06:32.148Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8", "shortName": "Zabbix", "dateUpdated": "2026-04-22T07:06:32.148Z" }, "title": "Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-488", "description": "CWE-488: Exposure of Data Element to Wrong Session", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-124", "descriptions": [ { "lang": "en", "value": "CAPEC-124: Shared Resource Manipulation" } ] } ], "affected": [ { "vendor": "Zabbix", "product": "Zabbix", "repo": "https://git.zabbix.com/", "modules": [ "Server", "Proxy" ], "versions": [ { "status": "affected", "version": "6.0.0", "lessThanOrEqual": "6.0.41", "changes": [ { "at": "6.0.42", "status": "unaffected" } ], "versionType": "git" }, { "status": "affected", "version": "7.0.0", "lessThanOrEqual": "7.0.18", "changes": [ { "at": "7.0.19", "status": "unaffected" } ], "versionType": "git" }, { "status": "affected", "version": "7.2.0", "lessThanOrEqual": "7.2.12", "changes": [ { "at": "7.2.13", "status": "unaffected" } ], "versionType": "git" }, { "status": "affected", "version": "7.4.0", "lessThanOrEqual": "7.4.2", "changes": [ { "at": "7.4.3", "status": "unaffected" } ], "versionType": "git" } ], "defaultStatus": "unknown" } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

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 <a href='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'>in Zabbix documentation</a>.

" } ] } ], "references": [ { "url": "https://support.zabbix.com/browse/ZBX-27638" } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subAvailabilityImpact": "LOW", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "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" } } ], "configurations": [ { "lang": "en", "value": "A regular Zabbix administrator (non-super) can overwrite some built in JavaScript functions that are then executed for other objects. Alternatively, a regular Zabbix administrator can read global JavaScript variables.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

A regular Zabbix administrator (non-super) can overwrite some built in JavaScript functions that are then executed for other objects. Alternatively, a regular Zabbix administrator can read global JavaScript variables.

" } ] } ], "solutions": [ { "lang": "en", "value": "Update the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don't store secret data in global variables.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

Update the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don't store secret data in global variables.

" } ] } ], "credits": [ { "lang": "en", "value": "Zabbix wants to thank Yerdan (big_john) for submitting this report on the HackerOne bug bounty platform.", "type": "reporter" } ], "source": { "discovery": "EXTERNAL" }, "x_generator": { "engine": "Vulnogram 1.0.1" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-03-24T18:36:08.999862Z", "id": "CVE-2026-23919", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-24T18:36:16.860Z" } } ] } }