Vulnerability in Zabbix

CVE-2026-23927

A user able to connect to Agent 2 can inject an Oracle TNS connection string via the 'service' parameter. This can lead to Agent 2 connecting to an attacker-controlled server and leaking Oracle database credentials if they are saved in a named session.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (11.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-23927: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000

Affected products

  • Zabbix — versions 6.0.0, 7.0.0, 7.4.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-23927?
CVE-2026-23927 is a medium-severity vulnerability in Zabbix, classified under Insufficiently Protected Credentials. CVSS score: 6.5/10. Published 2026-05-06.
How severe is CVE-2026-23927?
Medium severity. CVSS v3 base score is 6.5 out of 10.