6.8Medium
Zabbix Zabbix
CVE-2026-23926
An authenticated (non-super) administrator can create a maintenance period with a JavaScript payload that is executed by any user that opens tooltip for that maintenance period in the Host navigator widget. This can allow the attacker to perform unauthorized actions depending on which user opens the tooltip.
What this means for your business
- It affects Zabbix. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an administrator login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 21% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Zabbix, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 6.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H- CVSS v4
- 7.3
- Weakness
- CWE-79
- Assigned by
- security@zabbix.com
Dates
- Published
- 2026-05-06
- Last modified
- 2026-09-18
- Sources
- NVD
Affected products
- Zabbix Zabbix7.0.0 - 7.0.24, 7.4.0 - 7.4.8
As listed in the NVD configuration data. Not a statement about your estate.