Out-of-bounds read in urldecode() on NetBSD_CVE-2026-7258

6.3 / 10

MEDIUM

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.

Basic Information

ID CVE-2026-7258

Source php

Published May 10, 2026 at 04:28

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-125

References

github.com /php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4

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    "published": "2026-05-10T04:28:14.520Z",
    "modified": "2026-05-10T04:28:41.203Z",
    "type": "cve",
    "title": "Out-of-bounds read in urldecode() on NetBSD",
    "source": "php",
    "references": "https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4",
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        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Amber",
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