CVE-2026-45736
ws: Uninitialized memory disclosure
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
ws is an open source WebSocket client and server for Node.js. Prior to 8.20.1, the websocket.close() implementation is vulnerable to uninitialized memory disclosure when a TypedArray is passed as the reason argument. This vulnerability is fixed in 8.20.1.
| CWE | CWE-908 |
| Vendor | websockets |
| Product | ws |
| Published | May 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
websockets / ws
>= 8.0.0, < 8.20.1