Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-55517 Denial of Service via Non-ASCII WebSocket Headers in Deno Before 2.7.5 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-55517
Post summary
The entry announces CVE-2026-55517 as a denial‑of‑service flaw in Deno versions prior to 2.7.5 caused by non‑ASCII WebSocket headers, but it contains no proof of concept, exploit code, or patch information.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | deno | deno | - | - | - |