# Ylianst vulnerabilities

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

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Ylianst: 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, MeshCentral stored XSS via unsanitized agent fields, was published on 18 August 2026. Nothing was published in the last eight weeks. 1 technology has a page of its own.

## Counts

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

## About Ylianst

Ylian Saint-Hilaire, known as Ylianst, is the developer of MeshCentral and related management tools.

## Latest Ylianst vulnerabilities

- [MeshCentral stored XSS via unsanitized agent fields](https://junglewise.ai/threats/meshcentral-stored-xss-via-unsanitized-agent-fields-1e9bee49) (high, CVSS 8.3, published 18 Aug 2026)
- [CVE-2026-66420: MeshCentral WebSocket hijacking bypass in webserver.js](https://junglewise.ai/threats/cve-2026-66420-meshcentral-websocket-hijacking-bypass-in-webserver-js) (high, CVSS 8.8, published 30 Jul 2026)
- [CVE-2023-51838: Ylianst MeshCentral weak cryptographic algorithm](https://junglewise.ai/threats/cve-2023-51838-ylianst-meshcentral-weak-cryptographic-algorithm) (low, CVSS 3.1, published 2 Feb 2024)
- [CVE-2023-51837: Ylianst MeshCentral missing SSL certificate validation](https://junglewise.ai/threats/cve-2023-51837-ylianst-meshcentral-missing-ssl-certificate-validation) (low, CVSS 3.1, published 30 Jan 2024)
- [CVE-2023-51842: Ylianst MeshCentral algorithm downgrade in TLS](https://junglewise.ai/threats/cve-2023-51842-ylianst-meshcentral-algorithm-downgrade-in-tls) (low, CVSS 3.1, published 29 Jan 2024)

## Most severe Ylianst vulnerabilities

- [CVE-2026-66420: MeshCentral WebSocket hijacking bypass in webserver.js](https://junglewise.ai/threats/cve-2026-66420-meshcentral-websocket-hijacking-bypass-in-webserver-js) (high, CVSS 8.8, published 30 Jul 2026)
- [MeshCentral stored XSS via unsanitized agent fields](https://junglewise.ai/threats/meshcentral-stored-xss-via-unsanitized-agent-fields-1e9bee49) (high, CVSS 8.3, published 18 Aug 2026)
- [CVE-2023-51842: Ylianst MeshCentral algorithm downgrade in TLS](https://junglewise.ai/threats/cve-2023-51842-ylianst-meshcentral-algorithm-downgrade-in-tls) (low, CVSS 3.1, published 29 Jan 2024)
- [CVE-2023-51838: Ylianst MeshCentral weak cryptographic algorithm](https://junglewise.ai/threats/cve-2023-51838-ylianst-meshcentral-weak-cryptographic-algorithm) (low, CVSS 3.1, published 2 Feb 2024)
- [CVE-2023-51837: Ylianst MeshCentral missing SSL certificate validation](https://junglewise.ai/threats/cve-2023-51837-ylianst-meshcentral-missing-ssl-certificate-validation) (low, CVSS 3.1, published 30 Jan 2024)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 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 | 0 | 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 |

## Ylianst technologies

- [Ylianst MeshCentral](https://junglewise.ai/threats/technologies/meshcentral): 6 vulnerabilities

## 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, "Ylianst vulnerabilities", https://junglewise.ai/threats/vendors/ylianst, 9 November 2026.