---
id: CVE-2026-55862
title: >-
  pupnp: Incomplete fix for CVE-2021-28302: recursive DOM functions cause stack
  overflow
summary: >-
  pupnp is an SDK for development of UPnP device and control point applications.
  Prior to 2.0.0, multiple ixml DOM traversal functions process deeply nested
  XML with unbounded recursion. The iterative XML parser accepts the document,
  but i…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-674
vendor: pupnp
product: pupnp
affected:
  - pupnp < 2.0.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T19:07:16.486742Z'
exploitAvailable: true
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:07:30.396Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55862'
references:
  - url: 'https://github.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247'
    label: 'https://github.com/pupnp/pupnp/security/advisories/GHSA-25cx-xv8x-j247'
  - url: >-
      https://github.com/pupnp/pupnp/commit/82ccaec7ab6b1258ea1ac66374d8940712ccd4c4
    label: >-
      https://github.com/pupnp/pupnp/commit/82ccaec7ab6b1258ea1ac66374d8940712ccd4c4
  - url: 'https://github.com/pupnp/pupnp/releases/tag/release-2.0.0'
    label: 'https://github.com/pupnp/pupnp/releases/tag/release-2.0.0'
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-16T17:24:46.753Z'
---

## Overview

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.0, multiple ixml DOM traversal functions process deeply nested XML with unbounded recursion. The iterative XML parser accepts the document, but ixmlPrintDomTreeRecursive in ixml/src/ixml.c and ixmlNode_getElementsByTagNameRecursive, ixmlNode_getElementsByTagNameNSRecursive, ixmlNode_cloneNodeTreeRecursive, and ixmlNode_isAncestor in ixml/src/node.c recurse over firstChild and nextSibling links. An unauthenticated peer on the local network can supply deeply nested XML through a SOAP request, exhaust a service thread's stack, and crash the UPnP service. This is an incomplete-fix case for CVE-2021-28302 because its remediation converted ixmlNode_free but left these traversal paths recursive. This issue is fixed in 2.0.0.

## Affected

- `pupnp < 2.0.0`

## Remediation

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