PT-2026-39446 · Php · Php

Ilija Tovilo + 1 · Published 2026-05-10 · Updated 2026-05-10 · CVE-2026-7258

NVD

CVSS v4.0

6.3

Medium

Base vector

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

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-7258

Affected Products

Php

References · 2

• https://github.com/php/php-src/security/advisories/GHSA-m8rr-4c36-8gq4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7258 · Security Note