CVE-2026-65954
HighCVSS 8.6Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
In PHPCSUtils from 1.0.0-alpha1 until 1.2.3, AbstractArrayDeclarationSniff::getActualArrayKey() evaluates attacker-controlled array-key expressions with eval(). This allows callback-form keys in untrusted PHP code scanned by an extending sniff to execute arbitrary commands on the scanning host.
Risk Assessment
If the organization scans untrusted PHP code using extending sniffs (e.g., Universal.Arrays.DuplicateArrayKey), an attacker can execute arbitrary commands on the scanning machine. This leads to full host compromise.
Recommendation
Update PHPCSUtils to version 1.2.3 or later. Avoid scanning untrusted PHP code until the fix is deployed.
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Original NVD description (English source)
PHPCSUtils is a suite of utility functions for use with PHP_CodeSniffer. From 1.0.0-alpha1 until 1.2.3, PHPCSUtils\AbstractSniffs\AbstractArrayDeclarationSniff::getActualArrayKey() evaluates attacker-controlled array-key expressions with eval(), allowing callback-form keys in untrusted PHP code scanned by an extending sniff to execute arbitrary commands on the scanning host. Known reachable paths include Universal.Arrays.DuplicateArrayKey and Universal.Arrays.MixedArrayKeyTypes. This issue is fixed in version 1.2.3.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

