# Socket.IO vulnerabilities

Source: https://junglewise.ai/threats/vendors/socket-io  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/socket-io.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Socket.IO: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-102600, was published on 29 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 5 (0 critical, 0 exploited in the wild)

## About Socket.IO

Real-time communication library for bidirectional communication between web clients and servers.

## Latest Socket.IO vulnerabilities

- [CVE-2026-102600: Socket.IO cluster-engine prototype pollution denial of service](https://junglewise.ai/threats/cve-2026-102600-socket-io-enables-bidirectional-and-low-latency-communication) (high, CVSS 7.5, published 29 Sep 2026)
- [CVE-2026-69185: Socket.IO socket.io-parser memory exhaustion via binary attachments](https://junglewise.ai/threats/cve-2026-69185-socket-io-socket-io-parser-memory-exhaustion-via-binary) (high, CVSS 7.5, published 3 Aug 2026)
- [CVE-2026-33151: Socket.IO denial of service via unbounded binary attachments](https://junglewise.ai/threats/cve-2026-33151-socket-io-denial-of-service-via-unbounded-binary-attachments) (medium, CVSS 4, published 18 Mar 2026)
- [CVE-2024-38355: socket.io has an unhandled 'error' event](https://junglewise.ai/threats/cve-2024-38355-socket-io-denial-of-service-via-unhandled-error-event) (high, CVSS 7.3, published 19 Jun 2024)
- [CVE-2022-21676: Socket.io engine.io denial of service via uncaught exception](https://junglewise.ai/threats/cve-2022-21676-socket-io-engine-io-denial-of-service-via-uncaught-exception) (low, CVSS 3.1, published 13 Jan 2022)

## Most severe Socket.IO vulnerabilities

- [CVE-2026-69185: Socket.IO socket.io-parser memory exhaustion via binary attachments](https://junglewise.ai/threats/cve-2026-69185-socket-io-socket-io-parser-memory-exhaustion-via-binary) (high, CVSS 7.5, published 3 Aug 2026)
- [CVE-2026-102600: Socket.IO cluster-engine prototype pollution denial of service](https://junglewise.ai/threats/cve-2026-102600-socket-io-enables-bidirectional-and-low-latency-communication) (high, CVSS 7.5, published 29 Sep 2026)
- [CVE-2024-38355: socket.io has an unhandled 'error' event](https://junglewise.ai/threats/cve-2024-38355-socket-io-denial-of-service-via-unhandled-error-event) (high, CVSS 7.3, published 19 Jun 2024)
- [CVE-2026-33151: Socket.IO denial of service via unbounded binary attachments](https://junglewise.ai/threats/cve-2026-33151-socket-io-denial-of-service-via-unbounded-binary-attachments) (medium, CVSS 4, published 18 Mar 2026)
- [CVE-2022-21676: Socket.io engine.io denial of service via uncaught exception](https://junglewise.ai/threats/cve-2022-21676-socket-io-engine-io-denial-of-service-via-uncaught-exception) (low, CVSS 3.1, published 13 Jan 2022)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Socket.IO vulnerabilities", https://junglewise.ai/threats/vendors/socket-io, 9 November 2026.