CVE-2026-45736
Medium
Description
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.
SeverityMedium
CVSS4.4
Exploit probability—
ProductWs
PublishedMay 15, 2026
First seenMay 15, 2026
Weakness typeCWE-908CWE-908
How to fix
Update
- ws_project ws8.20.1 or later
- ws8.20.1 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:48151
- access.redhat.com/errata/RHSA-2026:57590
- access.redhat.com/errata/RHSA-2026:66545
- access.redhat.com/errata/RHSA-2026:66488
- access.redhat.com/errata/RHSA-2026:34374
- access.redhat.com/errata/RHSA-2026:36754
- access.redhat.com/errata/RHSA-2026:33574
- access.redhat.com/errata/RHSA-2026:29197
- access.redhat.com/errata/RHSA-2026:26638
- access.redhat.com/errata/RHSA-2026:26994
- access.redhat.com/errata/RHSA-2026:27171
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ws_project ws | 8.0.0 ≤ v < 8.20.1 | 8.20.1 |
| wsnpm | 8.0.0 ≤ v < 8.20.1 | 8.20.1 |
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