Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-48779— ws: Memory exhaustion DoS from tiny fragments and data chunks

Quick assessment

Affected
websockets ws
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WebSockets ws是WebSockets团队开源的一个 Node.js WebSocket 库。 websockets ws 1.1.0版本至5.2.5之前版本、6.0.0版本至6.2.4之前版本、7.0.0版本至7.5.11之前版本和8.0.0版本至8.21.0之前版本存在资源管理错误漏洞，该漏洞源于内存耗尽，可能导致远程对等体分配和持有结构包装器，消耗超出默认消息大小限制的内存，进而导致进程因内存耗尽而终止。

CVSS 7.5 · High EPSS 0.81% · P54

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 4

VendorProduct Version RangeStatus
websockets ws >= 1.1.0, < 5.2.5 affected
>= 6.0.0, < 6.2.4 affected
>= 7.0.0, < 7.5.11 affected
>= 8.0.0, < 8.21.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-48779

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ws: Memory exhaustion DoS from tiny fragments and data chunks
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
websockets ws 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WebSockets ws是WebSockets团队开源的一个 Node.js WebSocket 库。 websockets ws 1.1.0版本至5.2.5之前版本、6.0.0版本至6.2.4之前版本、7.0.0版本至7.5.11之前版本和8.0.0版本至8.21.0之前版本存在资源管理错误漏洞，该漏洞源于内存耗尽，可能导致远程对等体分配和持有结构包装器，消耗超出默认消息大小限制的内存，进而导致进程因内存耗尽而终止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
websockets ws >= 1.1.0, < 5.2.5 -

II. Public POCs for CVE-2026-48779

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 6496 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-48779

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-48779 (4)

Vendor Advisories for CVE-2026-48779 (1)

IV. Related Vulnerabilities

Same product: ws
Same vendor: websockets
Same weakness: CWE-400

V. Comments for CVE-2026-48779

No comments yet

Leave a comment