HOMEVULNERABILITIESCVE-2026-48779
HIGH

CVE-2026-48779

CWE-400Published: June 17, 2026· Updated: Jun 18, 2026

7.5
CVSS v3.1

Official Description

ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.

NVD Source

Technical Analysis

CVE-2026-48779 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 availability disruption (denial of service), 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
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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

PATCHhttps://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7
PATCHhttps://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53
PATCHhttps://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94
PATCHhttps://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8
PATCHhttps://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p
PATCHhttps://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p

All References (6)

→
https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7Patch
→
https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53Patch
→
https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94Patch
→
https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8Patch
→
https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4pMitigation · Patch · Vendor Advisory · Exploit
→
https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4pMitigation · Patch · Vendor Advisory · Exploit

Quick Facts

CVE IDCVE-2026-48779
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected1 vendor
PublishedJun 17, 2026

Related CVEs (CWE-400)

CVE-2026-30141
9.8
CVE-2026-8856
9.1
CVE-2026-7790
8.7
CVE-2025-32424
8.7
CVE-2026-45169
8.7
CVE-2026-33155
8.7

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-48779 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.
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