CVE-2026-23920
Description
A flaw was found in Zabbix. Authenticated users can bypass input validation in host and event action scripts by injecting a newline character. This bypass occurs because the validation regex, which uses start-of-line (^) and end-of-line ($) anchors, operates in multiline mode. Successful exploitation allows an attacker to inject and execute arbitrary shell commands, potentially leading to full system compromise.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
