CVE-2026-23921High· 8.8▾ MidnightPoC availableA 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 dire…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 48.4 · likelihood 0.7 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Sep 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
2.9%
2.9% → 3.5%
1 GitHub repo (last check)
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.
zabbix >= 7.0.0, < 7.0.22zabbix >= 7.2.0, < 7.2.15zabbix >= 7.4.0, < 7.4.6Upgrade past the affected range:
zabbix 7.4.6Connected by shared product, vendor, weakness, or advisory.
CVE-2026-59781High· 7.8When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions
CVE-2026-23938Medium· 4.9An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.
CVE-2026-23934Medium· 6.5An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.
CVE-2026-23931Medium· 4.3The frontend validatate.api.exists action can be exploited by authenticated users to extract plaintext user macro values leading to potential loss of confidentiality.
CVE-2026-23933Critical· 9.1In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed
CVE-2026-23935Medium· 4.9A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.