CVE-2026-23921

Name	CVE-2026-23921
Description	A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL selects via the sortfield parameter. Although query results are not returned directly, an attacker can exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
zabbix (PTS)	bullseye	1:5.0.8+dfsg-1	vulnerable
	bullseye (security)	1:5.0.47+dfsg-0+deb11u1	vulnerable
	bookworm	1:6.0.14+dfsg-1	vulnerable
	trixie	1:7.0.22+dfsg-1~deb13u1	fixed
	forky, sid	1:7.0.22+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
zabbix	source	trixie	1:7.0.22+dfsg-1~deb13u1
zabbix	source	(unstable)	1:7.0.22+dfsg-1

[bookworm] - zabbix <no-dsa> (Minor issue)
https://support.zabbix.com/browse/ZBX-27640