CVE-2026-77630

pupnp: Denial of service via blocking DNS resolution in parse_uri()/GENA callback parsing

Published Oct 16, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
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
Type Values Removed Values Added
First Time appeared Pupnp
Pupnp pupnp
Vendors & Products Pupnp
Pupnp pupnp
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 16, 2026, 5:06 PM
Reserved
Aug 20, 2026, 8:52 PM
Status
Analyzed
Published
Oct 16, 2026, 4:21 PM
Modified
Oct 20, 2026, 7:36 PM