pupnp is an SDK for development of UPnP device and control point applications. Prior to 22.0.4, parse_hostport in upnp/src/genlib/net/uri/uri.c synchronously calls getaddrinfo while parse_uri is processing attacker-supplied hostnames from inbound HTTP request targets in upnp/src/genlib/net/http/httpparser.c and GENA SUBSCRIBE CALLBACK headers handled by create_url_list in upnp/src/gena/gena_device.c. A remote unauthenticated peer can choose a slow or nonresponsive hostname and block a bounded miniserver worker for the resolver timeout, allowing a small number of requests to exhaust the thread pool and deny UPnP service. This issue is fixed in 22.0.4.
History

Tue, 20 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Pupnp Project
Pupnp Project pupnp
CPEs cpe:2.3:a:pupnp_project:pupnp:*:*:*:*:*:*:*:*
Vendors & Products Pupnp Project
Pupnp Project pupnp

Sun, 18 Oct 2026 05:30:00 +0000

Type Values Removed Values Added
First Time appeared Pupnp
Pupnp pupnp
Vendors & Products Pupnp
Pupnp pupnp

Fri, 16 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 16 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Description pupnp is an SDK for development of UPnP device and control point applications. Prior to 22.0.4, parse_hostport in upnp/src/genlib/net/uri/uri.c synchronously calls getaddrinfo while parse_uri is processing attacker-supplied hostnames from inbound HTTP request targets in upnp/src/genlib/net/http/httpparser.c and GENA SUBSCRIBE CALLBACK headers handled by create_url_list in upnp/src/gena/gena_device.c. A remote unauthenticated peer can choose a slow or nonresponsive hostname and block a bounded miniserver worker for the resolver timeout, allowing a small number of requests to exhaust the thread pool and deny UPnP service. This issue is fixed in 22.0.4.
Title pupnp: Denial of service via blocking DNS resolution in parse_uri()/GENA callback parsing
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-16T15:36:05.117Z

Updated: 2026-10-16T17:06:16.423Z

Reserved: 2026-08-20T20:52:01.927Z

Link: CVE-2026-77630

cve-icon Vulnrichment

Updated: 2026-10-16T16:46:59.445Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-16T16:21:03.187

Modified: 2026-10-20T19:36:35.460

Link: CVE-2026-77630

cve-icon Redhat

No data.