CVE-2020-36048

HIGH EPSS 87.1%
Published Jan 8, 20215y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jan 8, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

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

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
87.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 1

VendorProductVersionRange
socketengine.io* <4.0.0

References 3

  • blog.caller.xyz https://blog.caller.xyz/socketio-engineio-dos/
    ExploitThird Party Advisory
  • github.com https://github.com/bcaller/kill-engine-io
    Third Party Advisory
  • github.com https://github.com/socketio/engine.io/commit/734f9d1268840722c41219e69eb58318e0b2ac6b
    PatchThird Party Advisory

Remediation

  • github.com https://github.com/socketio/engine.io/commit/734f9d1268840722c41219e69eb58318e0b2ac6b
    PatchThird Party Advisory