---
id: CVE-2026-57487
title: >-
  libupnp chunked HTTP bodies can bypass g_maxContentLength and be fully
  buffered
summary: >-
  pupnp is an SDK for development of UPnP device and control point applications.
  Prior to 2.0.2, Transfer-Encoding: chunked causes the HTTP parser in
  upnp/src/genlib/net/http/httpparser.c to leave parser->content_length at zero
  while parse…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-770
vendor: pupnp
product: pupnp
affected:
  - pupnp < 2.0.2
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:33:56.394Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-57487'
references:
  - url: 'https://github.com/pupnp/pupnp/security/advisories/GHSA-gcj7-j9f7-q84c'
    label: 'https://github.com/pupnp/pupnp/security/advisories/GHSA-gcj7-j9f7-q84c'
  - url: >-
      https://github.com/pupnp/pupnp/commit/9ff9bc583ad8ee4ba022634434a7b71db9bd96e1
    label: >-
      https://github.com/pupnp/pupnp/commit/9ff9bc583ad8ee4ba022634434a7b71db9bd96e1
  - url: 'https://github.com/pupnp/pupnp/releases/tag/release-2.0.2'
    label: 'https://github.com/pupnp/pupnp/releases/tag/release-2.0.2'
tags:
  - cve.org
ingestedAt: '2026-10-16T17:24:46.756Z'
---

## Overview

pupnp is an SDK for development of UPnP device and control point applications. Prior to 2.0.2, Transfer-Encoding: chunked causes the HTTP parser in upnp/src/genlib/net/http/httpparser.c to leave parser->content_length at zero while parser_parse_chunky_entity and parser_parse_chunky_body accumulate decoded bytes in parser->msg.entity. The g_maxContentLength checks in http_RecvMessage in upnp/src/genlib/net/http/httpreadwrite.c therefore reject oversized numeric Content-Length bodies but do not enforce the same limit on decoded chunked bodies. A remote peer that can reach a SOAP, GENA, miniserver, or control-point HTTP response path can make the process buffer an entity larger than the configured maximum, causing resource exhaustion and denial of service. This issue is fixed in 2.0.2.

## Affected

- `pupnp < 2.0.2`

## Remediation

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