Description
Execution time for an unsuccessful login differs when using a non-existing username compared to using an existing one.
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 | 1:7.0.9+dfsg-1 | — |
| Debian 13 | zabbix | 1:7.0.9+dfsg-1 | — |
| Debian 12 | zabbix | No fix yet | — |
| Debian 11 | zabbix | 1:5.0.46+dfsg-1+deb11u1 | DLA-4131-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | zabbix | No fix yet | — |
| Ubuntu 26.04 LTS | zabbix | No fix yet | — |
| Ubuntu 25.10 | 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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | zabbix | 4.0.12-4.45.1 | SUSE-SU-2026:0483-1 |
Advisories 3
- DLA-4131-1 zabbix - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2026:0483-1 Security update for zabbix SUSE / openSUSE Security Updates · Feb 13, 2026
- WID-SEC-2025-0671 Zabbix: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 12, 2026