CVE-2026-91765

HIGH
MEDIUM Priority: 0.03 BB Relevance: 75/100
Published: 2026-09-25 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. 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. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
php php 8.2.0 – 8.2.34
php php 8.3.0 – 8.3.35
php php 8.4.0 – 8.4.26
php php 8.5.0 – 8.5.11

References & Advisories (1)

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.38%
Raw Score 0.003780
Percentile 31.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00378
2026-10-28
0.00378

Intelligence Sources

nvd ref →