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5 vulnerabilities found for socket.io by socketio

CVE-2026-69185 (GCVE-0-2026-69185)
Vulnerability from cvelistv5
Published
2026-08-03 19:09
Modified
2026-08-03 20:31
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-20 - Improper Input Validation
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Summary
Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6.
References
Impacted products
Vendor Product Version
socketio socket.io Version: < 3.3.6
Version: >= 3.4.0, < 3.4.5
Version: >= 4.0.0, < 4.2.7
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CVE-2026-59725 (GCVE-0-2026-59725)
Vulnerability from cvelistv5
Published
2026-07-08 15:37
Modified
2026-07-08 17:00
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-404 - Improper Resource Shutdown or Release
Summary
Socket.IO enables bidirectional and low-latency communication for every platform. From 4.1.0 before 6.6.7, Engine.IO protocol v4 polling transport does not properly close the HTTP response for invalid binary POST requests with Content-Type: application/octet-stream, allowing an unauthenticated attacker to exhaust server-side connections and sockets. This issue is fixed in version 6.6.7.
References
Impacted products
Vendor Product Version
socketio socket.io Version: >= 4.1.0, < 6.6.7
 Create a notification for this product.
Show details on NVD website

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CVE-2026-59724 (GCVE-0-2026-59724)
Vulnerability from cvelistv5
Published
2026-07-08 15:35
Modified
2026-07-08 19:41
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-20 - Improper Input Validation
Summary
Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as __proto__ through an inherited property of the clients object during WebTransport upgrade handling, causing a TypeError and denial of service. This issue is fixed in version 6.6.7.
References
Impacted products
Vendor Product Version
socketio socket.io Version: >= 6.5.0, < 6.6.7
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-33151 (GCVE-0-2026-33151)
Vulnerability from cvelistv5
Published
2026-03-20 20:13
Modified
2026-03-23 16:50
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-20 - Improper Input Validation
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Summary
Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This issue has been patched in versions 3.3.5, 3.4.4, and 4.2.6.
References
Impacted products
Vendor Product Version
socketio socket.io Version: < 3.3.5
Version: >= 3.4.0, < 3.4.4
Version: >= 4.0.0, < 4.2.6
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2024-38355 (GCVE-0-2024-38355)
Vulnerability from cvelistv5
Published
2024-06-19 19:48
Modified
2024-09-03 20:35
Severity ?
7.3 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-20 - Improper Input Validation
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
Summary
Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. This issue is fixed by commit `15af22fc22` which has been included in `socket.io@4.6.2` (released in May 2023). The fix was backported in the 2.x branch as well with commit `d30630ba10`. Users are advised to upgrade. Users unable to upgrade may attach a listener for the "error" event to catch these errors.
References
Impacted products
Vendor Product Version
socketio socket.io Version: < 2.5.1
Version: >= 3.0.0,< 4.6.2
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