Vulnerability · Published Aug 18, 2026 · Assigned by Zabbix
CVE-2026-1199API and Frontend login lockout race condition
Medium 6.9
In plain English
A medium-severity race condition in Zabbix from Zabbix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.2%top 86.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Zabbix API and Frontend login lockout mechanism has a flaw where several unsuccessful login requests are not properly counted towards the block counter if sent simultaneously, potentially allowing for more password guesses than intended.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zabbix | no fix listed | DEBIAN-CVE-2026-1199 |
| Debian:13 | zabbix | no fix listed | DEBIAN-CVE-2026-1199 |
| Debian:14 | zabbix | 1:7.0.29+dfsg-1 | DEBIAN-CVE-2026-1199 |
| Ubuntu:26.04:LTS | zabbix | no fix listed | UBUNTU-CVE-2026-1199 |
| Ubuntu:26.10 | zabbix | no fix listed | UBUNTU-CVE-2026-1199 |
Affected products (as reported)
Weakness: CWE-362 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N