CVE-2026-7258

MEDIUM EPSS 25.5%

Published May 10, 20261mo ago · Modified Jun 17, 20261w ago

6.3 CVSS 4.0

Medium

Published May 10, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

6.3

Exploitability

—

Impact

—

Vector string

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

25.5% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 4

Vendor	Product	Version	Range
php	php	*	≥8.2.0 – <8.2.21
php	php	*	≥8.3.0 – <8.3.31
php	php	*	≥8.4.0 – <8.4.21
php	php	*	≥8.5.0 – <8.5.6

References 1

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

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.