CVE-2026-7568 PHP — Exploit & Vulnerability Details MEDIUM

Parameter	Value
CVSS	6.3 (MEDIUM)
Affected Versions	8.2.0 — 8.5.6
Fixed In	8.2.31
Type	CWE-125 (Out-of-bounds Read), CWE-190 (Integer Overflow)
Vendor	PHP
Public PoC	No

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position within the input string. If a string longer than 2,147,483,647 bytes is passed, a signed integer overflow occurs, resulting in undefined behavior. This can lead to an out-of-bounds read, causing a segmentation fault or access to unrelated memory, and may affect the availability of the PHP process.

Attack Parameters

Attack Vector

Network

Can be exploited remotely

Attack Complexity

High

Difficult to exploit

Attack Requirements

Present

Additional conditions required

Privileges Required

None

No privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

Low

Partial data leak

Integrity

Low

Partial data modification

Availability

Low

Partial disruption

CVSS Vector v4.0

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

CWE-190 Integer Overflow

Vulnerable Products 4

Configuration	From (including)	Up to (excluding)
Php Php cpe:2.3:a:php:php::::::::	`8.2.0`	`8.2.31`
Php Php cpe:2.3:a:php:php::::::::	`8.3.0`	`8.3.31`
Php Php cpe:2.3:a:php:php::::::::	`8.4.0`	`8.4.21`
Php Php cpe:2.3:a:php:php::::::::	`8.5.0`	`8.5.6`