NULL pointer dereference in Php
CVE-2026-7259
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, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and deni…
EPSS: 0.001 (20.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-2026-7259?
- CVE-2026-7259 is a medium-severity vulnerability in Php, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-05-10.
- How severe is CVE-2026-7259?
- Medium severity. CVSS v3 base score is 6.5 out of 10.