Medium
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-23919
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:28 UTC · Revision 1
Source evidence
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.
osv:CVE-2026-23919
Complete source record
{
"id": "c73b79827d5f1c0979b2b7f0e26308721b4d832a05f58b38cf3ef22399fc9e32",
"url": "https://osv.dev/vulnerability/CVE-2026-23919",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-23919",
"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 in Zabbix documentation.",
"evidence": "osv:CVE-2026-23919",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-23919",
"aliases": [
"CVE-2026-23919"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L"
}
],
"affected": [
{
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"repo": "https://github.com/zabbix/zabbix",
"type": "GIT",
"events": [
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{
"fixed": "6b0c021686541fa9adff0750822aff16d8f415dc"
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{
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{
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{
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23919.json",
"vanir_signatures": [
{
"id": "CVE-2026-23919-7dd2354a",
"digest": {
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},
"source": "https://github.com/zabbix/zabbix/commit/6b0c021686541fa9adff0750822aff16d8f415dc",
"target": {
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},
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{
"id": "CVE-2026-23919-c34683d4",
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"source": "https://github.com/zabbix/zabbix/commit/9c308d6f49cbb36fe3a1818f7257aa4a99874d72",
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{
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"vanir_signatures_modified": "2026-10-24T14:37:33Z"
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],
"modified": "2026-10-24T14:37:33.806899354Z",
"provider": "osv",
"references": [
"https://support.zabbix.com/browse/ZBX-27638"
],
"provider_metadata": {
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},
"related_cves": [
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"value": "CVE-2026-23919",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443800,
"published_at": "2026-03-24T19:16:49.29+00:00"
}