{"id":"GHSA-p86g-xrr2-pf7c","summary":"CoreWCF: Pre-authentication infinite-loop CPU exhaustion in CoreWCF net.tcp / net.pipe / net.uds framing handshake","details":"### Impact\nAn unauthenticated remote attacker can pin one server thread‑pool worker at 100 % CPU per connection. With a few connections, the CPU usage can be exhausted.\n\n#### Preconditions\nAn attacker being able to reach a service which is exposing an endpoint using one of NetTcpBinding, NetNamedPipeBinding, or UnixDomainSocketBinding.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nNone","aliases":["CVE-2026-54772"],"modified":"2026-06-19T21:11:30.452042Z","published":"2026-06-19T20:46:40Z","database_specific":{"github_reviewed_at":"2026-06-19T20:46:40Z","nvd_published_at":null,"cwe_ids":["CWE-400","CWE-835"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-p86g-xrr2-pf7c"},{"type":"PACKAGE","url":"https://github.com/CoreWCF/CoreWCF"}],"affected":[{"package":{"name":"CoreWCF.NetFramingBase","ecosystem":"NuGet","purl":"pkg:nuget/CoreWCF.NetFramingBase"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1"}]}],"versions":["1.4.0","1.4.0-preview1","1.4.1","1.4.2","1.5.0","1.5.0-preview1","1.5.1","1.5.2","1.6.0","1.7.0","1.8.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-p86g-xrr2-pf7c/GHSA-p86g-xrr2-pf7c.json"}},{"package":{"name":"CoreWCF.NetFramingBase","ecosystem":"NuGet","purl":"pkg:nuget/CoreWCF.NetFramingBase"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.9.0"},{"fixed":"1.9.1"}]}],"versions":["1.9.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-p86g-xrr2-pf7c/GHSA-p86g-xrr2-pf7c.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}