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CVE-2026-77630

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

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.34%Unchanged since Oct 17, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

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

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.

Record
CVE-2026-77630
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2026-102933 7.5

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.

Record
EUVD-2026-102933
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2026-77630
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSV 7.5

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

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.

Record
CVE-2026-77630
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVDEBIAN-CVE-2026-77630 7.5

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.

Record
DEBIAN-CVE-2026-77630
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-77630 7.5

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.

Record
UBUNTU-CVE-2026-77630
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
pupnp
Debian:13
 All versions, plus listed versions
1:1.14.20-11:1.14.20-1+deb13u11:1.14.23-11:1.14.24-11:1.14.24-2
Show 8 moreShow less
1:1.14.24-31:1.14.25-11:1.14.31-11:1.18.0-11:1.18.4-11:1.18.5-11:22.1.8-11:22.1.8-2
 None known
pupnp
Debian:14
 before 1:22.1.8-2, plus listed versions
1:1.14.20-11:1.14.23-11:1.14.24-11:1.14.24-21:1.14.24-3
Show 6 moreShow less
1:1.14.25-11:1.14.31-11:1.18.0-11:1.18.4-11:1.18.5-11:22.1.8-1
1:22.1.8-2
libupnp
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1:1.6.19+git20141001-11:1.6.19+git20141001-1ubuntu11:1.6.19+git20160116-11:1.6.19+git20160116-1ubuntu0.1~esm1
 None known
mediatomb
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.12.1-47-g7ab7616-1ubuntu10.12.1-47-g7ab7616-1ubuntu2
 None known
libupnp
Ubuntu:18.04:LTS
 All versions, plus listed versions
1:1.6.22-11:1.6.24-11:1.6.24-21:1.6.24-31:1.6.24-4
 None known
pupnp-1.8
Ubuntu:18.04:LTS
 All versions, plus listed versions
1:1.8.2-21:1.8.2-3
 None known
pupnp-1.8
Ubuntu:20.04:LTS
 All versions, plus listed versions
1:1.8.4-2ubuntu2
 None known
pupnp-1.8
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:1.8.4-2ubuntu2
 None known
pupnp
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:1.14.18-1ubuntu11:1.14.18-1.1ubuntu11:1.14.18-1.1ubuntu2
 None known
pupnp
Ubuntu:26.10
 All versions, plus listed versions
1:1.14.25-1ubuntu11:1.14.31-1ubuntu11:1.14.31-1ubuntu2
 None known
pupnp
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:1.14.24-3ubuntu11:1.14.25-1ubuntu1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-77630 is a high vulnerability (CVSS 7.5) in Pupnp, published October 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.34%, the 27th percentile. Fixed in pupnp 1:22.1.8-2.

References

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