Review reviewHigh

CVE-2026-45736

websockets ws, Cryostat 4 on RHEL 9, Red Hat Ansible Automation Platform 2.6

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.

CVSS
7.5
EPSS
0.74%
51.2% percentile
CISA KEV
Not listed
Published
2026.05.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.74%
Technical severityCVSS 7.5

Vulnerability overview

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.

Affected product and versions

Product
websockets ws, Cryostat 4 on RHEL 9, Red Hat Ansible Automation Platform 2.6
Affected versions
>= >= 8.0.0, < 8.20.1, >= 8.0.0 < 8.20.1
Fixed versions
8.20.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that websockets ws, Cryostat 4 on RHEL 9, Red Hat Ansible Automation Platform 2.6 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-824, CWE-908