{"id":"CVE-2026-77630","title":"pupnp: Denial of service via blocking DNS resolution in parse_uri()/GENA callback parsing","summary":"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 fro…","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-400"],"vendor":"pupnp","product":"pupnp","affected":["pupnp < 22.0.4"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T16:46:58.448632Z"},"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:06:16.423Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77630","references":[{"url":"https://github.com/pupnp/pupnp/security/advisories/GHSA-46ph-jff5-5h77","label":"https://github.com/pupnp/pupnp/security/advisories/GHSA-46ph-jff5-5h77"},{"url":"https://github.com/pupnp/pupnp/commit/5dba8070b4d64d976f8e6fc13f1f301befebe7d2","label":"https://github.com/pupnp/pupnp/commit/5dba8070b4d64d976f8e6fc13f1f301befebe7d2"},{"url":"https://github.com/pupnp/pupnp/releases/tag/release-22.0.4","label":"https://github.com/pupnp/pupnp/releases/tag/release-22.0.4"},{"url":"https://issues.oss-fuzz.com/issues/531780528","label":"https://issues.oss-fuzz.com/issues/531780528"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.840Z","slug":"CVE-2026-77630","body":"## Overview\n\npupnp 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.\n\n## Affected\n\n- `pupnp < 22.0.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}