{"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","slug":"CVE-2026-57487","body":"## Overview\n\npupnp 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.\n\n## Affected\n\n- `pupnp < 2.0.2`\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":[]}