Out-of-bounds Read in Php
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 an…
Vulnerability class: Buffer Overflow
EPSS: 0.000 (6.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
References
- security@php.net (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-7258?
- CVE-2026-7258 is a high-severity vulnerability in Php, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-05-10.
- How severe is CVE-2026-7258?
- High severity. CVSS v3 base score is 7.5 out of 10.