Riskcovery

CVE-2026-48779

ws: Memory exhaustion DoS from tiny fragments and data chunks

State
Published
Severity
7.5 High
Published
Jun 16, 2026
Updated
Sep 11, 2026
Reserved
May 22, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HGitHub_M
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hredhat-SADP

Weaknesses

  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-1050 Excessive Platform Resource Consumption within a Loop

Affected Products

ProductVersions
wswebsockets
  • >= 1.1.0, < 5.2.5Affected
  • >= 6.0.0, < 6.2.4Affected
  • >= 7.0.0, < 7.5.11Affected
  • >= 8.0.0, < 8.21.0Affected

References

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