{"id":"CVE-2026-57487","title":"libupnp: libupnp: Denial of Service via oversized chunked HTTP requests (CVE-2026-57487)","summary":"A flaw was found in libupnp. The HTTP parser fails to enforce configured message size limits when processing chunked transfer-encoded HTTP requests. A remote attacker can exploit this vulnerability by sending an excessively large chunked p…","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":"vendor","cwe":["CWE-770"],"vendor":"Red Hat","product":"pupnp","affected":["pupnp < 2.0.2"],"published":"2026-10-16","updated":"2026-10-21","sourceUpdated":"2026-10-21T09:30:56+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57487.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57487.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-57487"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-57487"},{"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":["csaf","vex","red-hat","cve.org"],"epss":0.0041,"epssPercentile":0.35024,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-21T02:21:26.610826Z"},"ingestedAt":"2026-10-16T17:24:46.756Z","slug":"CVE-2026-57487","body":"## Overview\n\nA flaw was found in libupnp. The HTTP parser fails to enforce configured message size limits when processing chunked transfer-encoded HTTP requests. A remote attacker can exploit this vulnerability by sending an excessively large chunked payload, forcing the application to buffer data beyond intended boundaries. This issue leads to memory exhaustion and a Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-57487.json)\n\n**libupnp: libupnp: Denial of Service via oversized chunked HTTP requests**. Released 2026-10-16, updated 2026-10-21.\n\nNot affected:\n\n- All currently supported Red Hat products\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}