What is CVE-2026-65954?

CVE-2026-65954 is a high-severity vulnerability in Phpcsstandards Phpcsutils, classified under Eval Injection. CVSS score: 8.6/10. Published 2026-10-12.

How severe is CVE-2026-65954?

High severity. CVSS v3 base score is 8.6 out of 10.

RCE in Phpcsstandards Phpcsutils

CVE-2026-65954

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.

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Phpcsstandards Phpcsutils — versions >= 1.0.0-alpha1, <= 1.2.2

Weakness classification (CWE)

CWE-95 — Eval Injection

References

Frequently asked questions

What is CVE-2026-65954?: CVE-2026-65954 is a high-severity vulnerability in Phpcsstandards Phpcsutils, classified under Eval Injection. CVSS score: 8.6/10. Published 2026-10-12.
How severe is CVE-2026-65954?: High severity. CVSS v3 base score is 8.6 out of 10.