CVE-2026-17544: php from 8.4.0 (inclusive), before 8.4.24 (exclusive), from 8.5.0 (inclusive), before 8.5.9 (exclusive); +1 more…

CVE-2026-17544. CVSS 3.1 base score 9.8 (CRITICAL, NVD). EPSS 0.00426 (percentile 0.35849), scored 22-Oct-2026.

Affected technology

php · from 8.4.0 (inclusive), before 8.4.24 (exclusive)
php

php · from 8.5.0 (inclusive), before 8.5.9 (exclusive)
php

PHP · 8.4.* to before 8.4.24, 8.5.* to before 8.5.9
PHP Group

Description’s affected range: versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 8.1/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 24-Oct-2026 01:43 UTC

CWE: CWE-787
CCR priority: 39.3 /100 (P4)
CVSS 3.1: 9.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · NVD
EPSS: 0.00426 · percentile 0.35849 · 2026-10-22
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-17544.html