Vulnerability · Published Oct 12, 2026 · Assigned by GitHub_M

CVE-2026-65954PHPCSUtils: Remote code execution via eval() in AbstractArrayDeclarationSniff::getActualArrayKey()

High 8.6

In plain English

A high-severity security flaw in PHPCSUtils from PHPCSStandards. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.2%top 95.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	phpcsstandards/phpcsutils	1.2.3	GHSA-r6hr-vr92-vv28

Affected products (as reported)

Vendor	Product	Versions
PHPCSStandards	PHPCSUtils	>= 1.0.0-alpha1, <= 1.2.2

Weakness: CWE-95 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

https://github.com/PHPCSStandards/PHPCSUtils/security/advisories/GHSA-r6hr-vr92-vv28 x_refsource_CONFIRM
https://github.com/PHPCSStandards/PHPCSUtils/commit/e8648633ff5b8219b1b3e6346ce85abfc30f1429 x_refsource_MISC
https://github.com/PHPCSStandards/PHPCSUtils/releases/tag/1.2.3 x_refsource_MISC