Published Aug 11, 2023Sources checked Oct 30, 2026
9.8CRITICALCVSS out of 10
What this means
Review the available evidence
CVE-2023-3824 and is rated Critical severity with a CVSS score of 9.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Oct 21, 2026
CBL-Mariner Releases
Vendor-listed releases
8.2.8-1
8.1.22-1
CISA KEVNot listedBased on the latest collected catalog
EPSS21.8%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2023-3824?
In PHP version 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE.