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CVE-2026-48779

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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.

CVSS 7.5 · High · EPSS 1.4% · Fix available

Published
Updated

Stack: system · node

Affected products and versions

  • ws

    Versions
    • >= 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

    No fix published

  • node-ws Debian:12

    Versions
    • 8.11.0+~cs13.7.3-1
    • 8.11.0+~cs13.7.3-2
    • 8.18.0+~cs13.7.11-1
    • 8.18.0+~cs14.5.15-1
    • 8.18.1+~cs14.18.2-1
    • 8.19.0+~cs14.19.1-1
    • 8.20.1+~cs14.19.1-1
    • 8.21.0+~cs14.19.1-1
    • 8.21.1+~cs14.19.1-1
    • 8.21.3+~cs14.19.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Debian:13

    Versions
    • 8.18.1+~cs14.18.2-1
    • 8.19.0+~cs14.19.1-1
    • 8.20.1+~cs14.19.1-1
    • 8.21.0+~cs14.19.1-1
    • 8.21.1+~cs14.19.1-1
    • 8.21.3+~cs14.19.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Debian:14

    Versions
    • 8.18.1+~cs14.18.2-1
    • 8.19.0+~cs14.19.1-1
    • 8.20.1+~cs14.19.1-1
    Affected ranges
    • ECOSYSTEM: < 8.21.0+~cs14.19.1-1

    Update to 8.21.0+~cs14.19.1-1

  • ws npm

    Affected ranges
    • SEMVER: ≥ 1.1.0, < 5.2.5

    Update to 5.2.5

  • ws npm

    Affected ranges
    • SEMVER: ≥ 6.0.0, < 6.2.4

    Update to 6.2.4

  • ws npm

    Affected ranges
    • SEMVER: ≥ 7.0.0, < 7.5.11

    Update to 7.5.11

  • ws npm

    Affected ranges
    • SEMVER: ≥ 8.0.0, < 8.21.0

    Update to 8.21.0

  • node-ws Ubuntu:16.04:LTS

    Versions
    • 0.7.2+ds1.349b7460-1
    • 1.0.1+ds1.e6ddaae4-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:18.04:LTS

    Versions
    • 1.1.0+ds1.e6ddaae4-3build1
    • 1.1.0+ds1.e6ddaae4-3ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:20.04:LTS

    Versions
    • 1.1.0+ds1.e6ddaae4-5
    • 7.2.1-2
    • 7.2.1-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:22.04:LTS

    Versions
    • 7.4.2+~cs18.0.8-2
    • 7.5.5+~cs13.0.13-1
    • 8.5.0+~cs13.3.3-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:24.04:LTS

    Versions
    • 8.11.0+~cs13.7.3-1
    • 8.11.0+~cs13.7.3-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:25.10

    Versions
    • 8.18.0+~cs14.5.15-1
    • 8.18.1+~cs14.18.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:26.10

    Versions
    • 8.19.0+~cs14.19.1-1
    • 8.20.1+~cs14.19.1-1
    • 8.21.3+~cs14.19.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • node-ws Ubuntu:26.04:LTS

    Versions
    • 8.18.1+~cs14.18.2-1
    • 8.19.0+~cs14.19.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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