{"id":"EUVD-2026-38549","revision":"1364d70b0faa41a4a2a7db9a4f8e8e64","records":[{"revision":"1364d70b0faa41a4a2a7db9a4f8e8e64","observedAt":"2026-11-05T11:45:43.386+00:00","statement":{"source":"euvd","id":"EUVD-2026-38549","aliases":["CVE-2026-55517","GHSA-x2qc-cmh9-f4hf"],"title":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-W…","description":"Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-WebSocket-Protocol and Sec-WebSocket-Extensions response headers in a way that assumed their bytes were always printable ASCII. A response header containing non-visible-ASCII bytes (0x80-0xFF) caused a panic that aborted the entire Deno process. This vulnerability is fixed in 2.7.5.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","score":4.3,"severity":null}],"references":["https://github.com/denoland/deno/security/advisories/GHSA-x2qc-cmh9-f4hf"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38549","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 23, 2026, 5:24:59 PM","dateUpdated":"Jun 23, 2026, 5:52:56 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-38549","identifiers":["EUVD-2026-38549","CVE-2026-55517","GHSA-x2qc-cmh9-f4hf"]},"retained":false,"historicalAffected":[]}],"coverage":[]}