CVE-2026-23919 (GCVE-0-2026-23919)
Vulnerability from cvelistv5 – Published: 2026-03-24 18:26 – Updated: 2026-03-24 18:36
VLAI?
Title
Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server
Summary
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>.
Severity ?
CWE
- CWE-488 - Exposure of Data Element to Wrong Session
Assigner
References
Impacted products
Credits
Zabbix wants to thank Yerdan (big_john) for submitting this report on the HackerOne bug bounty platform.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-23919",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-24T18:36:08.999862Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-24T18:36:16.860Z",
"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": "6.0.41",
"status": "unaffected"
}
],
"lessThanOrEqual": "6.0.40",
"status": "affected",
"version": "6.0.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.0.19",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.0.18",
"status": "affected",
"version": "7.0.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.2.13",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.2.12",
"status": "affected",
"version": "7.2.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.4.3",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.4.2",
"status": "affected",
"version": "7.4.0",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eA 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.\u003c/p\u003e"
}
],
"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."
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Zabbix wants to thank Yerdan (big_john) for submitting this report on the HackerOne bug bounty platform."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eFor 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 \u0026lt;a href=\u0027https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe\u0027\u0026gt;in Zabbix documentation\u0026lt;/a\u0026gt;.\u003c/p\u003e"
}
],
"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 \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."
}
],
"impacts": [
{
"capecId": "CAPEC-124",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-124: Shared Resource Manipulation"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "ADJACENT",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "HIGH",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"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",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-488",
"description": "CWE-488: Exposure of Data Element to Wrong Session",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-24T18:26:43.877Z",
"orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"shortName": "Zabbix"
},
"references": [
{
"url": "https://support.zabbix.com/browse/ZBX-27638"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eUpdate the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don\u0027t store secret data in global variables.\u003c/p\u003e"
}
],
"value": "Update the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don\u0027t store secret data in global variables."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server",
"x_generator": {
"engine": "Vulnogram 1.0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"assignerShortName": "Zabbix",
"cveId": "CVE-2026-23919",
"datePublished": "2026-03-24T18:26:43.877Z",
"dateReserved": "2026-01-19T14:02:54.327Z",
"dateUpdated": "2026-03-24T18:36:16.860Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-23919",
"date": "2026-04-14",
"epss": "0.00024",
"percentile": "0.06554"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23919\",\"sourceIdentifier\":\"security@zabbix.com\",\"published\":\"2026-03-24T19:16:49.290\",\"lastModified\":\"2026-03-25T15:41:58.280\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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 \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.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security@zabbix.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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/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\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"LOW\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"LOW\",\"subAvailabilityImpact\":\"LOW\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security@zabbix.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-488\"}]}],\"references\":[{\"url\":\"https://support.zabbix.com/browse/ZBX-27638\",\"source\":\"security@zabbix.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-23919\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-24T18:36:08.999862Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-24T18:36:13.549Z\"}}], \"cna\": {\"title\": \"Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Zabbix wants to thank Yerdan (big_john) for submitting this report on the HackerOne bug bounty platform.\"}], \"impacts\": [{\"capecId\": \"CAPEC-124\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-124: Shared Resource Manipulation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.1, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"ADJACENT\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"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\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"HIGH\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"LOW\", \"vulnAvailabilityImpact\": \"LOW\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://git.zabbix.com/\", \"vendor\": \"Zabbix\", \"modules\": [\"Server\", \"Proxy\"], \"product\": \"Zabbix\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"6.0.41\", \"status\": \"unaffected\"}], \"version\": \"6.0.0\", \"versionType\": \"git\", \"lessThanOrEqual\": \"6.0.40\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"7.0.19\", \"status\": \"unaffected\"}], \"version\": \"7.0.0\", \"versionType\": \"git\", \"lessThanOrEqual\": \"7.0.18\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"7.2.13\", \"status\": \"unaffected\"}], \"version\": \"7.2.0\", \"versionType\": \"git\", \"lessThanOrEqual\": \"7.2.12\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"7.4.3\", \"status\": \"unaffected\"}], \"version\": \"7.4.0\", \"versionType\": \"git\", \"lessThanOrEqual\": \"7.4.2\"}], \"defaultStatus\": \"unknown\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Update the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don\u0027t store secret data in global variables.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eUpdate the affected components to their respective fixed versions. Make sure JavaScript item preprocessing scripts don\u0027t store secret data in global variables.\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://support.zabbix.com/browse/ZBX-27638\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.1\"}, \"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 \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.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eFor 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 \u0026lt;a href=\u0027https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe\u0027\u0026gt;in Zabbix documentation\u0026lt;/a\u0026gt;.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-488\", \"description\": \"CWE-488: Exposure of Data Element to Wrong Session\"}]}], \"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\", \"value\": \"\u003cp\u003eA 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.\u003c/p\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"72de3e22-0555-4a0d-ae81-9249e0f0a1e8\", \"shortName\": \"Zabbix\", \"dateUpdated\": \"2026-03-24T18:26:43.877Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-23919\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-24T18:36:16.860Z\", \"dateReserved\": \"2026-01-19T14:02:54.327Z\", \"assignerOrgId\": \"72de3e22-0555-4a0d-ae81-9249e0f0a1e8\", \"datePublished\": \"2026-03-24T18:26:43.877Z\", \"assignerShortName\": \"Zabbix\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…