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  5. CVE-2020-36048

CVE-2020-36048: Resource exhaustion in engine.io

February 9, 2022 (updated May 29, 2025)

Engine.IO before 4.0.0 and 3.6.0 allows attackers to cause a denial of service (resource consumption) via a POST request to the long polling transport.

References

  • blog.caller.xyz/socketio-engineio-dos
  • github.com/advisories/GHSA-j4f2-536g-r55m
  • github.com/bcaller/kill-engine-io
  • github.com/socketio/engine.io
  • github.com/socketio/engine.io/commit/58e274c437e9cbcf69fd913c813aad8fbd253703
  • github.com/socketio/engine.io/commit/734f9d1268840722c41219e69eb58318e0b2ac6b
  • nvd.nist.gov/vuln/detail/CVE-2020-36048

Code Behaviors & Features

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Affected versions

All versions before 3.6.0

Fixed versions

  • 3.6.0

Solution

Upgrade to version 3.6.0 or above.

Impact 7.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-400: Uncontrolled Resource Consumption

Source file

npm/engine.io/CVE-2020-36048.yml

Spotted a mistake? Edit the file on GitLab.

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