# Mark3labs vulnerabilities

Source: https://junglewise.ai/threats/vendors/mark3labs  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/mark3labs.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Mark3labs: 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, mark3labs mcp-go SSRF and credential leak via unvalidated Location header, was published on 5 November 2026. 2 vulnerabilities in the last four weeks, level on the four before (2). 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 2
- Last 90 days: 5
- All time: 5 (0 critical, 0 exploited in the wild)

## Latest Mark3labs vulnerabilities

- [mark3labs mcp-go SSRF and credential leak via unvalidated Location header](https://junglewise.ai/threats/go-2026-6911-ssrf-and-credential-leak-via-unvalidated-location-header-1f243351) (info, published 5 Nov 2026)
- [CVE-2026-123272: Mark3labs mcp-go improper validation in OAuthHandler](https://junglewise.ai/threats/cve-2026-123272-mark3labs-mcp-go-before-v1-2-1-contains-an-improper-validation) (high, CVSS 8, published 5 Nov 2026)
- [CVE-2026-108859: mcp-go denial of service in StreamableHTTPServer.ServeHTTP](https://junglewise.ai/threats/cve-2026-108859-mcp-go-through-1-2-1-contains-a-denial-of-service-vulnerability) (high, CVSS 7.5, published 11 Oct 2026)
- [CVE-2026-79534: mark3labs mcp-filesystem-server directory traversal in validatePath](https://junglewise.ai/threats/cve-2026-79534-mark3labs-mcp-filesystem-server-v0-11-1-is-vulnerable-to) (info, published 29 Sep 2026)
- [CVE-2026-81092: mcp-go HTTP Host header validation bypass](https://junglewise.ai/threats/cve-2026-81092-mcp-go-http-host-header-validation-bypass) (medium, CVSS 6.8, published 27 Aug 2026)

## Most severe Mark3labs vulnerabilities

- [CVE-2026-123272: Mark3labs mcp-go improper validation in OAuthHandler](https://junglewise.ai/threats/cve-2026-123272-mark3labs-mcp-go-before-v1-2-1-contains-an-improper-validation) (high, CVSS 8, published 5 Nov 2026)
- [CVE-2026-108859: mcp-go denial of service in StreamableHTTPServer.ServeHTTP](https://junglewise.ai/threats/cve-2026-108859-mcp-go-through-1-2-1-contains-a-denial-of-service-vulnerability) (high, CVSS 7.5, published 11 Oct 2026)
- [CVE-2026-81092: mcp-go HTTP Host header validation bypass](https://junglewise.ai/threats/cve-2026-81092-mcp-go-http-host-header-validation-bypass) (medium, CVSS 6.8, published 27 Aug 2026)
- [mark3labs mcp-go SSRF and credential leak via unvalidated Location header](https://junglewise.ai/threats/go-2026-6911-ssrf-and-credential-leak-via-unvalidated-location-header-1f243351) (info, published 5 Nov 2026)
- [CVE-2026-79534: mark3labs mcp-filesystem-server directory traversal in validatePath](https://junglewise.ai/threats/cve-2026-79534-mark3labs-mcp-filesystem-server-v0-11-1-is-vulnerable-to) (info, published 29 Sep 2026)

## Vulnerabilities per week

2 vulnerabilities in the last four weeks, level on the four before (2).

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 1 | 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 | 1 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 2 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Mark3labs technologies

- [Mark3labs Mcp-Go](https://junglewise.ai/threats/technologies/mcp-go): 4 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, "Mark3labs vulnerabilities", https://junglewise.ai/threats/vendors/mark3labs, 13 November 2026.