CVE-2026-7259

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, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::
	cpe:2.3:a:php:php::::::::

History

12 May 2026, 17:40

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
First Time		Php Php php
References	~~() https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75 -~~	() https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75 - Vendor Advisory
CPE		cpe:2.3:a:php:php::::::::

10 May 2026, 05:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-10 05:16

Updated : 2026-05-12 17:40

NVD link : CVE-2026-7259

Mitre link : CVE-2026-7259

CVE.ORG link : CVE-2026-7259

JSON object : View

Products Affected

php

php

CWE

CWE-476

NULL Pointer Dereference

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