---
id: CVE-2025-14181
title: >-
  The SOAP HTTP client guards its response buffer growth with a check that
  relies on signed integer overflow, which is undefined behaviour and is not
  guaranteed to trigger
summary: >-
  The SOAP HTTP client guards its response buffer growth with a check that
  relies on signed integer overflow, which is undefined behaviour and is not
  guaranteed to trigger. When the check is optimised away, a malicious SOAP
  server can make…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-190
vendor: PHP Group
product: ext-soap
affected:
  - ext-soap >= 8.2.* < 8.2.34
  - ext-soap >= 8.3.* < 8.3.35
  - ext-soap >= 8.4.* < 8.4.26
  - ext-soap >= 8.5.* < 8.5.11
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T21:17:19.840'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-14181'
references:
  - url: 'https://github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv'
    label: security@php.net
  - url: 'https://github.com/php/php-src/security/advisories/GHSA-cj93-vc83-wgqv'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-25T20:43:53.478398Z'
ingestedAt: '2026-09-25T21:19:40.138Z'
---

## Overview

The SOAP HTTP client guards its response buffer growth with a check that relies on signed integer overflow, which is undefined behaviour and is not guaranteed to trigger. When the check is optimised away, a malicious SOAP server can make the client allocate a buffer far smaller than the data it then writes into it, producing a heap buffer overflow.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.