CVE-2026-91765: php from 8.2.0 (inclusive), before 8.2.34 (exclusive), from 8.3.0 (inclusive), before 8.3.35 (exclusive), from 8.4.0…

CVE-2026-91765 affects azl3 php 8.3.33-1 on Azure Linux 3.0. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.00378 (percentile 0.31483), scored 25-Oct-2026. Fixed version: 7.2.34+e1. Fixed version: 8.1.34+e1.

Affected technology

php · from 8.2.0 (inclusive), before 8.2.34 (exclusive)
php

php · from 8.3.0 (inclusive), before 8.3.35 (exclusive)
php

php · from 8.4.0 (inclusive), before 8.4.26 (exclusive)
php

php · from 8.5.0 (inclusive), before 8.5.11 (exclusive)
php

PHP · 8.2.* to before 8.2.34, 8.3.* to before 8.3.35, 8.4.* to before 8.4.26, 8.5.* to before 8.5.11
PHP Group

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. Vendor/CNA’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 26-Oct-2026 06:07 UTC

CWE: CWE-674
Product: azl3 php 8.3.33-1 on Azure Linux 3.0
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.00378 · percentile 0.31483 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
Microsoft MSRC Security Update Guide (CVRF) · Source record · observed 2026-10-04 07:08:49.022374+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-23 16:20:36.797830+00:00 UTC
OSV.dev · Source record · observed 2026-10-25 21:45:52.076210+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-91765.html