CVE-2026-48779— ws: Memory exhaustion DoS from tiny fragments and data chunks
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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 |
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I. Basic Information for CVE-2026-48779
Vulnerability Information
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Vulnerability Title
ws: Memory exhaustion DoS from tiny fragments and data chunks
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
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 |
|---|
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Patches & Fixes for CVE-2026-48779 (4)
- 🔗 [dist] 6.2.4 · websockets/ws@86d3e8a · GitHubx_refsource_MISC
- 🔗 [dist] 7.5.11 · websockets/ws@fd36cd8 · GitHubx_refsource_MISC
- 🔗 [dist] 8.21.0 · websockets/ws@bca91ad · GitHubx_refsource_MISC
- 🔗 [dist] 5.2.5 · websockets/ws@b5372ac · GitHubx_refsource_MISC
Vendor Advisories for CVE-2026-48779 (1)
IV. Related Vulnerabilities
Same weakness: CWE-400
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Decompression Bomb Bypass via Negative max_length in Streami - CVE-2026-49293
CPU exhaustion via O(n^2) BigInt construction on radix-prefi - CVE-2026-48937
Node.js 22/24 HTTP/2服务器GoAway帧后持续接收数据漏洞 - CVE-2025-53114
CometD has acknowledgement extension out of memory - CVE-2025-32437
AutoGPT has a DoS vulnerability in MediaDurationBlock
V. Comments for CVE-2026-48779
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