Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()_CVE-2026-7259

2.1 / 10

LOW

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/U:Amber

Description

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().

Basic Information

ID CVE-2026-7259

Source php

Published May 10, 2026 at 04:13

Affected Product

Vendor PHP Group

Product PHP

Version 8.2.*

Affected Versions PHP Group PHP 8.2.*
PHP Group PHP 8.3.*
PHP Group PHP 8.4.*
PHP Group PHP 8.5.*

CWE Classification

CWE-476

References

github.com /php/php-src/security/advisories/GHSA-wm6j-2649-pv75

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    "published": "2026-05-10T04:13:26.766Z",
    "modified": "2026-05-10T04:13:26.766Z",
    "type": "cve",
    "title": "Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init()",
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