6.9

CVE-2026-1199: zabbix Race Condition

CVSS: 6.9v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-1199DEBIAN-CVE-2026-1199
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-1199 is a medium (CVSS 6.9) Race Condition vulnerability in zabbix. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.5% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-08-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

+0.01 pp

From 0.16% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • zabbixAll versions (No fix recorded) | < 1:7.0.29+dfsg-1
Ubuntu1 product
  • zabbixAll versions (No fix recorded)
Zabbix1 product
  • zabbix≥ 6.0.0, ≤ 6.0.46 | ≥ 7.0.0, ≤ 7.0.27 | ≥ 7.4.0, ≤ 7.4.11 | ≥ 6.0.0, < 6.0.47 | ≥ 7.0.0, < 7.0.28 | ≥ 7.4.0, < 7.4.12

3 vendors · 3 products

References

4 links