ws affected by a DoS when handling a request with many HTTP headers

Description

A request with a number of headers exceeding the[server.maxHeadersCount][] threshold could be used to crash a ws server.

Recommendation

Update the ws package to the latest compatible version. Followings are version details:

• Affected version(s): **>= 8.0.0, < 8.17.1

  >= 7.0.0, < 7.5.10

  >= 6.0.0, < 6.2.3

  >= 2.1.0, < 5.2.4**

• Patched version(s): **8.17.1

  7.5.10

  6.2.3

  5.2.4**

References

• GHSA-3h5v-q93c-6h6q
• CVE-2024-37890
• CWE-476
• CAPEC-310
• OWASP 2021-A6

Related Issues

• Finance.js vulnerable to DoS via the IRR function’s depth parameter - CVE-2025-56571
• Mermaid improperly sanitizes sequence diagram labels leading to XSS - CVE-2025-54881
• Payload does not invalidate JWTs after log out (GHSA-5v66-m237-hwf7) - CVE-2025-4643
• Vite's server.fs.deny bypassed with /. for files under project root - CVE-2025-46565

Tags:

npm

ws