Vulnerability CVE-2026-23920: Information
Description
Host and event action script input is validated with a regex (set by the administrator), but the validation runs in multiline mode. If ^ and $ anchors are used in user input validation, an injected newline lets authenticated users bypass the check and inject shell commands.
Severity: HIGH (7.7)
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| zabbix | sisyphus | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5812-1 | 414453 | Fixed |
| zabbix | sisyphus_riscv64 | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5986-1 | - | Fixed |
| zabbix | sisyphus_loongarch64 | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5918-1 | - | Fixed |
| zabbix | p11 | 7.0.25-alt0.p11.1 | 7.0.25-alt0.p11.1 | ALT-PU-2026-5930-2 | 414527 | Fixed |
| zabbix | p10 | 7.0.25-alt0.p10.1 | 7.0.25-alt0.p10.1 | ALT-PU-2026-6079-2 | 414532 | Fixed |
| zabbix | c10f2 | 7.0.25-alt0.c10f2.1 | 7.0.25-alt0.c10f2.1 | ALT-PU-2026-5950-2 | 414561 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://support.zabbix.com/browse/ZBX-27639 |