CVE-2026-23933

Name	CVE-2026-23933
Description	In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed. Currently the only known exploitation scenario is for deployments that utilize both - SAML authentication and guest users. In such cases the key can be used to forge valid session cookies, potentially leading to unauthorized access. For other Zabbix deployments this does not have a known impact.
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	fixed
	bullseye (security)	1:5.0.47+dfsg-0+deb11u1	fixed
	bookworm	1:6.0.14+dfsg-1	fixed
	trixie	1:7.0.22+dfsg-1~deb13u1	fixed
	sid	1:7.0.22+dfsg-1.1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
zabbix	source	(unstable)	(not affected)

- zabbix <not-affected> (Only affects 7.4.x)
https://support.zabbix.com/browse/ZBX-28071