CVE-2026-23923 | Zabbix up to 7.4.6 Frontend validate externally-controlled input to select classes or code

VDB-352835 · CVE-2026-23923 · GCVE-0-2026-23923 ZABBIX UP TO 7.4.6 FRONTEND VALIDATE EXTERNALLY-CONTROLLED INPUT TO SELECT CLASSES OR CODE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 0.77+ Summaryinfo A vulnerability was found in Zabbix up to 7.4.6. It has been rated as problematic. Affected is the function validate of the component Frontend. The manipulation leads to use of externally-controlled input to select classes or code. This vulnerability is referenced as CVE-2026-23923. Remote exploitation of the attack is possible. No exploit is available. Detailsinfo A vulnerability was found in Zabbix up to 7.4.6. It has been rated as problematic. This issue affects the function validate of the component Frontend. The manipulation with an unknown input leads to a use of externally-controlled input to select classes or code vulnerability. Using CWE to declare the problem leads to CWE-470. The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. Impacted is availability. The summary by CVE is: An unauthenticated attacker can exploit the Frontend 'validate' action to blindly instantiate arbitrary PHP classes. The impact depends on environment setup but appears limited at this time. It is possible to read the advisory at support.zabbix.com. The identification of this vulnerability is CVE-2026-23923 since 01/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type Network Management Software Name Zabbix Version 7.4.0 7.4.1 7.4.2 7.4.3 7.4.4 7.4.5 7.4.6 License open-source CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Use of externally-controlled input to select classes or code CWE: CWE-470 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 01/19/2026 CVE reserved 03/24/2026 +64 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: support.zabbix.com Status: Confirmed CVE: CVE-2026-23923 (🔒) GCVE (CVE): GCVE-0-2026-23923 GCVE (VulDB): GCVE-100-352835 Entryinfo Created: 03/24/2026 20:47 Changes: 03/24/2026 20:47 (65) Complete: 🔍 Cache ID: 99:A6A:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸