{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23923","assignerOrgId":"72de3e22-0555-4a0d-ae81-9249e0f0a1e8","state":"PUBLISHED","assignerShortName":"Zabbix","dateReserved":"2026-01-19T14:02:54.327Z","datePublished":"2026-03-24T18:29:23.165Z","dateUpdated":"2026-03-25T19:25:01.128Z"},"containers":{"cna":{"providerMetadata":{"orgId":"72de3e22-0555-4a0d-ae81-9249e0f0a1e8","shortName":"Zabbix","dateUpdated":"2026-03-24T18:29:23.165Z"},"title":"Unauthenticated arbitrary PHP class instantiation","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-470","description":"CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-138","descriptions":[{"lang":"en","value":"CAPEC-138: Reflection Injection"}]}],"affected":[{"vendor":"Zabbix","product":"Zabbix","repo":"https://git.zabbix.com/","modules":["Frontend"],"versions":[{"status":"affected","version":"7.4.0","lessThanOrEqual":"7.4.6","changes":[{"at":"7.4.7","status":"unaffected"}],"versionType":"git"}],"defaultStatus":"unknown"}],"descriptions":[{"lang":"en","value":"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.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>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.</p>"}]}],"references":[{"url":"https://support.zabbix.com/browse/ZBX-27641"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.9,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"}}],"configurations":[{"lang":"en","value":"The action can be invoked by any user able to reach Frontend.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>The action can be invoked by any user able to reach Frontend.</p>"}]}],"solutions":[{"lang":"en","value":"Update the affected components to their respective fixed versions.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Update the affected components to their respective fixed versions.</p>"}]}],"credits":[{"lang":"en","value":"Zabbix wants to thank pitticus for submitting this report on the HackerOne bug bounty platform.","type":"reporter"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.1"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-25T19:24:53.942052Z","id":"CVE-2026-23923","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-25T19:25:01.128Z"}}]}}