{"action":"Upgrade deno to 2.7.5 or later.","affected":[{"fixed":"2.7.5","introduced":"0"}],"component":"deno","cve_ids":["CVE-2026-55517"],"ecosystem":"deno","exploited":false,"fixed_versions":["2.7.5"],"ghsa_id":"GHSA-x2qc-cmh9-f4hf","id":"tcs_01M5K4YX6RC6K976MXRRWWD01R","modified_at":"2026-06-17T06:10:21Z","published_at":"2026-06-17T06:10:21Z","references":["https://github.com/denoland/deno/security/advisories/GHSA-x2qc-cmh9-f4hf","https://www.cve.org/CVERecord?id=CVE-2026-55517"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"deno-runtime","source_id":"GHSA-x2qc-cmh9-f4hf","url":"https://github.com/denoland/deno/security/advisories/GHSA-x2qc-cmh9-f4hf"}],"summary":"Denial of service via non-ASCII bytes in WebSocket response headers"}