8.8

CVE-2026-23920: zabbix OS Command Injection

CVSS: 8.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-23920DEBIAN-CVE-2026-23920
Published 24-03-2026Last modified 26-03-2026
Open JSON

Vulnerability summary

CVE-2026-23920 is a high (CVSS 8.8) OS Command Injection vulnerability in zabbix. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-03-2026
    PublishedVulnerability first disclosed.
  2. 26-03-2026
    Last modifiedVulnerability information updated.

Description

Host and event action script input is validated with a regex (set by the administrator), but the validation runs in multiline mode. If ^ and $ anchors are used in user input validation, an injected newline lets authenticated users bypass the check and inject shell commands.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

0.00 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.30%

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) | < 1:7.0.22+dfsg-1~deb13u1 | < 1:7.0.22+dfsg-1
Ubuntu1 product
  • zabbixAll versions (No fix recorded)
Zabbix1 product
  • zabbix≥ 7.0.0, ≤ 7.0.21 | ≥ 7.2.0, ≤ 7.2.14 | ≥ 7.4.0, ≤ 7.4.5 | ≥ 7.0.0, < 7.0.22 | ≥ 7.2.0, < 7.2.15 | ≥ 7.4.0, < 7.4.6

3 vendors · 3 products

References

4 links