Vulnerability · Published May 6, 2026 · Assigned by Zabbix
CVE-2026-23927Agent 2 Oracle plugin TNS connection string injection via the 'service' parameter
Medium 5.1
In plain English
A medium-severity security flaw 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 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.2%top 87.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zabbix | no fix listed | DEBIAN-CVE-2026-23927 |
| Debian:13 | zabbix | no fix listed | DEBIAN-CVE-2026-23927 |
| Debian:14 | zabbix | 1:7.0.27+dfsg-1 | DEBIAN-CVE-2026-23927 |
| Ubuntu:25.10 | zabbix | no fix listed | UBUNTU-CVE-2026-23927 |
| Ubuntu:26.04:LTS | zabbix | no fix listed | UBUNTU-CVE-2026-23927 |
| Ubuntu:26.10 | zabbix | no fix listed | UBUNTU-CVE-2026-23927 |
Affected products (as reported)
Weakness: CWE-522 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N