{"id":"CVE-2026-23919","aliases":["DEBIAN-CVE-2026-23919","EUVD-2026-14950","GHSA-h55g-ww3m-9hq9","UBUNTU-CVE-2026-23919"],"status":"published","title":"Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","severity":{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00255,"percentile":0.1724,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-488"],"published":"2026-03-24T18:26:43Z","modified":"2026-10-24T14:37:33Z","fixes":[{"ecosystem":"Debian:13","package":"zabbix","fixed_in":["1:7.0.22+dfsg-1~deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"zabbix","fixed_in":["1:7.0.22+dfsg-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:6.0.14+dfsg-1","1:6.0.23+dfsg-1","1:6.0.23+dfsg-1~bpo12+1","1:6.0.24+dfsg-1","1:6.0.25+dfsg-1","1:6.0.29+dfsg-1","1:7.0.0+dfsg-1","1:7.0.0+dfsg-2","1:7.0.0+dfsg-2~bpo12+1","1:7.0.1+dfsg-1","1:7.0.1+dfsg-1~bpo12+1","1:7.0.10+dfsg-1","1:7.0.10+dfsg-2","1:7.0.2+dfsg-1","1:7.0.2+dfsg-1~bpo12+1","1:7.0.22+dfsg-1","1:7.0.22+dfsg-1.1","1:7.0.22+dfsg-1~bpo13+1","1:7.0.22+dfsg-1~deb13u1","1:7.0.27+dfsg-1","1:7.0.29+dfsg-1","1:7.0.29+dfsg-2","1:7.0.29+dfsg-2~bpo13+1","1:7.0.3+dfsg-1","1:7.0.5+dfsg-1","1:7.0.5+dfsg-1~bpo12+1","1:7.0.6+dfsg-1","1:7.0.9+dfsg-1","1:7.0.9+dfsg-1~bpo12+1"]},{"source":"osv","ecosystem":"Debian:13","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.0.22+dfsg-1~deb13u1"}]}],"versions":["1:7.0.10+dfsg-2","1:7.0.22+dfsg-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.0.22+dfsg-1"}]}],"versions":["1:7.0.10+dfsg-2","1:7.0.22+dfsg-1~bpo13+1","1:7.0.22+dfsg-1~deb13u1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.0.6+dfsg-1ubuntu2","1:2.2.0+dfsg-1ubuntu1","1:2.2.0+dfsg-6ubuntu1","1:2.2.1+dfsg-1ubuntu3","1:2.2.2+dfsg-1ubuntu1","1:2.2.2+dfsg-1ubuntu1+esm1","1:2.2.2+dfsg-1ubuntu1+esm3","1:2.2.2+dfsg-1ubuntu1+esm4","1:2.2.2+dfsg-1ubuntu1+esm5"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.4.6+dfsg-1","1:2.4.7+dfsg-1","1:2.4.7+dfsg-2","1:2.4.7+dfsg-2ubuntu2","1:2.4.7+dfsg-2ubuntu2.1","1:2.4.7+dfsg-2ubuntu2.1+esm1","1:2.4.7+dfsg-2ubuntu2.1+esm2","1:2.4.7+dfsg-2ubuntu2.1+esm3","1:2.4.7+dfsg-2ubuntu2.1+esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.0.7+dfsg-3","1:3.0.12+dfsg-1","1:3.0.12+dfsg-1ubuntu0.1~esm1","1:3.0.12+dfsg-1ubuntu0.1~esm2","1:3.0.12+dfsg-1ubuntu0.1~esm3","1:3.0.12+dfsg-1ubuntu0.1~esm4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:4.0.4+dfsg-1build2","1:4.0.4+dfsg-1build3","1:4.0.11+dfsg-1","1:4.0.14+dfsg-1","1:4.0.15+dfsg-1","1:4.0.16+dfsg-1","1:4.0.16+dfsg-1build1","1:4.0.17+dfsg-1","1:4.0.17+dfsg-1ubuntu0.1~esm1","1:4.0.17+dfsg-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:5.0.8+dfsg-1build1","1:5.0.14+dfsg-1","1:5.0.17+dfsg-1","1:5.0.17+dfsg-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"zabbix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.10+dfsg-2","1:7.0.10+dfsg-2build1"]}],"products":[{"vendor":"zabbix","product":"zabbix"}],"references":[{"url":"https://support.zabbix.com/browse/ZBX-27638","tags":["Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23919"},{"url":"https://github.com/advisories/GHSA-h55g-ww3m-9hq9"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-23919","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-23919","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23919","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-23919","title":"Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T18:26:43.877Z","modified":"2026-04-22T07:06:32.148Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-488"],"updated_at":"2026-11-02T13:42:04.39372Z"}],"euvd":[{"id":"EUVD-2026-14950","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T18:26:43Z","modified":"2026-04-22T07:06:32Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"updated_at":"2026-11-02T19:24:21.101387Z"}],"ghsa":[{"id":"GHSA-h55g-ww3m-9hq9","title":"For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script...","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T21:31:23Z","modified":"2026-09-18T18:32:15Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"},{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","level":"medium"}],"cwes":["CWE-488"],"updated_at":"2026-11-02T15:12:11.358904Z"}],"nvd":[{"id":"CVE-2026-23919","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T19:16:49.29Z","modified":"2026-09-18T17:07:18.85Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"secondary"},{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","level":"medium","assessor":"primary"}],"cwes":["CWE-488"],"updated_at":"2026-11-02T14:12:10.568062Z"}],"osv":[{"id":"CVE-2026-23919","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T19:16:49.29Z","modified":"2026-10-24T14:37:33.806899354Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:59.079784Z"},{"id":"DEBIAN-CVE-2026-23919","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T19:16:49.29Z","modified":"2026-10-01T03:03:00.272081785Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:53.516942Z"},{"id":"UBUNTU-CVE-2026-23919","description":"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='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'\u003ein Zabbix documentation\u003c/a\u003e.","status":"published","published":"2026-03-24T19:16:00Z","modified":"2026-09-21T10:00:37.442251146Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"},{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T16:56:04.456047Z"}]}}