Description
Specially crafted string can cause a buffer overrun in the JSON parser library leading to a crash of the Zabbix Server or a Zabbix Proxy.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | zabbix | 1:6.0.23+dfsg-1 | — |
| Debian 13 | zabbix | 1:6.0.23+dfsg-1 | — |
| Debian 12 | zabbix | No fix yet | — |
| Debian 10 | zabbix | 1:4.0.4+dfsg-1+deb10u2 | DLA-3538-1 |
Advisories 2
- DLA-3538-1 zabbix - security update Debian Security (DSA / DLA) · Mar 9, 2026
- WID-SEC-2023-1753 Zabbix: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 18, 2025