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)
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
- CVE-2025-53114
CometD has acknowledgement extension out of memory - CVE-2025-32437
AutoGPT has a DoS vulnerability in MediaDurationBlock - CVE-2025-32436
AutoGPT has a DoS vulnerability in AddAudioToVideoBlock - CVE-2025-32424
AutoGPT has a DoS vulnerability in ScreenshotWebPageBlock - CVE-2025-32422
AutoGPT has a DoS vulnerability in FileStoreBlock with StepT
V. Comments for CVE-2026-48779
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