Description
The frontend validatate.api.exists action can be exploited by authenticated users to extract plaintext user macro values leading to potential loss of confidentiality.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zabbix | Zabbix | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | zabbix | No fix yet | — |
| Ubuntu 26.04 LTS | zabbix | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 20.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 18.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 16.04 LTS | zabbix | No fix yet | — |
| Ubuntu Pro 14.04 LTS | zabbix | No fix yet | — |
Advisories 2
- NCSC-2026-0320 Kwetsbaarheden verholpen in Zabbix NCSC-NL (Netherlands) · Aug 20, 2026
- WID-SEC-2026-2916 Zabbix: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 18, 2026