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High

DoS due to excessively large websocket message in ws

  • Disclosed: 18.02.2019
  • Updated: 11.10.2026 10:22

Affected versions of ws do not appropriately limit the size of incoming websocket payloads, which may result in a denial of service condition when the node process crashes after receiving a large payload.

Recommendation

Update to version 1.1.1 or later. Alternatively, set the maxpayload option for the ws server to a value smaller than 256MB.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package ws < 1.1.1 1.1.1

References

CVSS score -
Weakness (CWE)
CWE-400
Platform
npm
Package
ws
Disclosed
18.02.2019
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-6663-c963-2gqg - CC BY 4.0

Vulnerability history: ws

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

Total entries
7
First → latest
02.2019 06.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 4
  • Medium 2
  • Low 1

Disclosures per year

  1. ws: Memory exhaustion DoS from tiny fragments and data chunks
    High · 7.5 CVE-2026-48779 >= 1.1.0, < 5.2.5, >= 6.0.0, < 6.2.4, >= 7.0.0, < 7.5.11, >= 8.0.0, < 8.21.0 5.2.5, 6.2.4, 7.5.11, 8.21.0
  2. ws: Uninitialized memory disclosure
    Medium · 4.4 CVE-2026-45736 >= 8.0.0, < 8.20.1 8.20.1
  3. ws affected by a DoS when handling a request with many HTTP headers
    High · 7.5 CVE-2024-37890 >= 2.1.0, < 5.2.4, >= 6.0.0, < 6.2.3, >= 7.0.0, < 7.5.10, >= 8.0.0, < 8.17.1 5.2.4, 6.2.3, 7.5.10, 8.17.1
  4. ReDoS in Sec-Websocket-Protocol header
    Medium · 5.3 CVE-2021-32640 >= 7.0.0, < 7.4.6, >= 6.0.0, < 6.2.2, >= 5.0.0, < 5.2.3 7.4.6, 6.2.2, 5.2.3
  5. Denial of Service in ws
    High · 7.5 ghsa-5v72-xg48-5rpm >= 0.6.0, < 1.1.5, >= 2.0.0, < 3.3.1 1.1.5, 3.3.1
  6. DoS due to excessively large websocket message in ws this entry
    High CVE-2016-10542 < 1.1.1 1.1.1
  7. Remote Memory Disclosure in ws
    Low CVE-2016-10518 < 1.0.1 1.0.1

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