# Mattermost Plugins vulnerabilities

Source: https://junglewise.ai/threats/technologies/mattermost-plugins  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/mattermost-plugins.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Mattermost Plugins: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-9699, was published on 26 June 2026.

## Counts

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

## About Mattermost Plugins

Mattermost Plugins allow developers to extend and customize the functionality of the Mattermost collaboration platform.

## Latest Mattermost Plugins vulnerabilities

- [CVE-2026-9699: Mattermost Plugins sensitive information disclosure in OpenAI logging](https://junglewise.ai/threats/cve-2026-9699-mattermost-plugins-sensitive-information-disclosure-in-openai) (medium, CVSS 6.8, published 26 Jun 2026)
- [CVE-2026-6957: Mattermost Plugins path traversal in shared-channel attachment sync](https://junglewise.ai/threats/cve-2026-6957-mattermost-plugins-path-traversal-in-shared-channel-attachment) (high, CVSS 8, published 27 May 2026)
- [CVE-2026-6342: Mattermost Plugins incorrect authorization in group subscriptions](https://junglewise.ai/threats/cve-2026-6342-mattermost-plugins-incorrect-authorization-in-group-subscriptions) (medium, CVSS 4.3, published 18 May 2026)
- [CVE-2026-6341: Mattermost Plugins incorrect authorization in group API requests](https://junglewise.ai/threats/cve-2026-6341-mattermost-plugins-incorrect-authorization-in-group-api-requests) (medium, CVSS 4.3, published 18 May 2026)
- [CVE-2026-3109: Mattermost Plugins timestamp validation failure in Zoom webhook](https://junglewise.ai/threats/cve-2026-3109-mattermost-plugins-timestamp-validation-failure-in-zoom-webhook) (low, CVSS 2.2, published 26 Mar 2026)

## Most severe Mattermost Plugins vulnerabilities

- [CVE-2026-6957: Mattermost Plugins path traversal in shared-channel attachment sync](https://junglewise.ai/threats/cve-2026-6957-mattermost-plugins-path-traversal-in-shared-channel-attachment) (high, CVSS 8, published 27 May 2026)
- [CVE-2026-9699: Mattermost Plugins sensitive information disclosure in OpenAI logging](https://junglewise.ai/threats/cve-2026-9699-mattermost-plugins-sensitive-information-disclosure-in-openai) (medium, CVSS 6.8, published 26 Jun 2026)
- [CVE-2026-6342: Mattermost Plugins incorrect authorization in group subscriptions](https://junglewise.ai/threats/cve-2026-6342-mattermost-plugins-incorrect-authorization-in-group-subscriptions) (medium, CVSS 4.3, published 18 May 2026)
- [CVE-2026-6341: Mattermost Plugins incorrect authorization in group API requests](https://junglewise.ai/threats/cve-2026-6341-mattermost-plugins-incorrect-authorization-in-group-api-requests) (medium, CVSS 4.3, published 18 May 2026)
- [CVE-2026-3109: Mattermost Plugins timestamp validation failure in Zoom webhook](https://junglewise.ai/threats/cve-2026-3109-mattermost-plugins-timestamp-validation-failure-in-zoom-webhook) (low, CVSS 2.2, published 26 Mar 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 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 |

## Other Mattermost technologies

- [Mattermost Server](https://junglewise.ai/threats/technologies/server-public): 111 vulnerabilities
- [Mattermost Desktop App](https://junglewise.ai/threats/technologies/desktop-app): 14 vulnerabilities
- [Mattermost](https://junglewise.ai/threats/technologies/mattermost): 9 vulnerabilities
- [Mattermost GitHub Plugin for Mattermost](https://junglewise.ai/threats/technologies/github-plugin): 3 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, "Mattermost Plugins vulnerabilities", https://junglewise.ai/threats/technologies/mattermost-plugins, 12 November 2026.