CVE-2026-7258

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4	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, 17:41

Type	Values Removed	Values Added
References	~~() https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4 -~~	() https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4 - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CPE		cpe:2.3:a:php:php::::::::
First Time		Php 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 17:41

NVD link : CVE-2026-7258

Mitre link : CVE-2026-7258

CVE.ORG link : CVE-2026-7258

JSON object : View

Products Affected

php

php

CWE

CWE-125

Out-of-bounds Read

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