{"action":"Upgrade deno to 2.8.1 or later.","affected":[{"fixed":"2.8.1","introduced":"0"}],"component":"deno","cve_ids":["CVE-2026-49860"],"ecosystem":"deno","exploited":false,"fixed_versions":["2.8.1"],"ghsa_id":"GHSA-83pc-3rw9-qpwj","id":"tcs_01M5K4YSM1R0NJMJ547TDF5JXY","modified_at":"2026-06-02T19:31:32Z","published_at":"2026-05-27T13:07:44Z","references":["https://github.com/denoland/deno/security/advisories/GHSA-83pc-3rw9-qpwj","https://www.cve.org/CVERecord?id=CVE-2026-49860"],"severity":{"label":"medium","score":5.2},"sources":[{"source":"deno-runtime","source_id":"GHSA-83pc-3rw9-qpwj","url":"https://github.com/denoland/deno/security/advisories/GHSA-83pc-3rw9-qpwj"}],"summary":"WebSocket API sandbox bypass via missing post-DNS check"}