4.9

CVE-2026-23938: zabbix Uncaught Exception

CVSS: 4.9v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-23938DEBIAN-CVE-2026-23938
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-23938 is a medium (CVSS 4.9) Uncaught Exception vulnerability in zabbix. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.4% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
4.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.35%
0%100%
Low · +0.05 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

An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.05 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.35%

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) | < 1:7.0.27+dfsg-1
Ubuntu1 product
  • zabbixAll versions (No fix recorded)
Zabbix1 product
  • zabbix≥ 6.0.0, ≤ 6.0.46 | ≥ 7.0.0, ≤ 7.0.26 | ≥ 7.4.0, ≤ 7.4.10 | ≥ 6.0.0, < 6.0.47 | ≥ 7.0.0, < 7.0.27 | ≥ 7.4.0, < 7.4.11

3 vendors · 3 products

References

4 links