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CVE-2026-23920

Host and event action script regex validation can be bypassed in certain situations, leading to potential command injection

Published: Mar 24, 2026Updated: Mar 25, 2026 Sources: CVE List NVD BDUCWE-78
8.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 83.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LC:HI:HA:H
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:HConfidentiality
H
I:HIntegrity
H
A:HAvailability
H
Open in CVSS calculator →

Weaknesses

CWE-78

Affected Products

АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Zabbix LLC.
commercial·USaka zabbix llc, zabbix
ZabbixOn-premWeb App
Enterprise Software / itsm-monitoring
Zabbix
oss-project·SE
ZabbixOn-premWeb App
Enterprise Software / itsm-monitoring

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
View detailed technique mapping

References

https://support.zabbix.com/browse/ZBX-27639
support.zabbix.com
https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-23920
redos.red-soft.ru
https://support.zabbix.com/browse/ZBX-27639
support.zabbix.com
and 2 more references View all →

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