HIGH
CVE-2026-45736
CWE-908Published: May 15, 2026· Updated: May 19, 2026
7.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:0.8th
Official 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.
Technical Analysis
CVE-2026-45736 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
ws_project1 product
ws
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (3)
→
https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpxExploit · Patch · Vendor Advisory
→
https://github.com/websockets/ws/security/advisories/GHSA-58qx-3vcg-4xpxExploit · Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-45736
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-908
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 15, 2026
Related CVEs (CWE-908)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-45736 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.