CVE-2026-4339 SSRF via unvalidated attachment URLs in Mattermost Agents plugin MCP server

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to validate attachment URLs against internal or private IP ranges in the Mattermost Agents plugin MCP server which allows an attacker with access to the MCP server in stdio mode to perform server-side request forgery SS...

CVE-2026-4339 SSRF via unvalidated attachment URLs in Mattermost Agents plugin MCP server

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to validate attachment URLs against internal or private IP ranges in the Mattermost Agents plugin MCP server which allows an attacker with access to the MCP server in stdio mode to perform server-side request forgery SS...

CVE-2026-4339

Mattermost CPT: CVE-2026-4339 affects Mattermost versions 10.11.x up to 10.11.18, 11.6.x up to 11.6.3, and 11.5.x up to 11.5.6. The vulnerability arises from the Agents plugin MCP server failing to validate attachment URLs against internal/private IP ranges, enabling an attacker with MCP stdio ac...

PT-2026-56107

Summary @cardano402/mcp-server versions = 0.1.1 ship three security gaps that can lead to unauthorized fund movement when the package is used as designed an MCP server exposing Cardano payment tools to an Impact 1. No spending limits on signed payments An LLM or prompt-injected LLM calling tools...

CVE-2026-48529: Improper Access Control

GitHub MCP Server is GitHub's official MCP Server. From 0.22.0 until 1.1.2, when running in HTTP mode with --lockdown-mode enabled, the RepoAccessCache is implemented as a process-global singleton initialized with the first authenticated user's GraphQL client. All subsequent requests from differe...

CVE-2026-4339: Server-Side Request Forgery (SSRF)

Mattermost versions 10.11.x = 10.11.18, 11.6.x = 11.6.3, 11.5.x = 11.5.6 fail to validate attachment URLs against internal or private IP ranges in the Mattermost Agents plugin MCP server which allows an attacker with access to the MCP server in stdio mode to perform server-side request forgery SS...

GO-2026-5678 Obot has an authorization bypass in /mcp-connect/{id} that allows any authenticated user to use any registered MCP server in github.com/obot-platform/obot

Obot has an authorization bypass in /mcp-connect/id that allows any authenticated user to use any registered MCP server in github.com/obot-platform/obot...

PT-2026-52494

Name of the Vulnerable Software and Affected Versions LibreChat versions prior to 0.8.5 Description LibreChat is an enhanced ChatGPT clone supporting multiple AI providers. The MCP OAuth implementation fails to validate that the resource parameter from OAuth Protected Resource metadata RFC 9728...

Jenkins MCP Server Plugin missing a permission check

Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build. This allows attackers with Item/Read permission to obtain the Pipeline script of jobs. MCP Server Plugin...

GHSA-MPFF-XHG4-VR45 Jenkins MCP Server Plugin missing a permission check

Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build. This allows attackers with Item/Read permission to obtain the Pipeline script of jobs. MCP Server Plugin...

CVE-2026-57300

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access...

CVE-2026-57300

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access...

PT-2026-51810

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb 2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access...

CVE-2026-57300: Missing Authorization

A missing permission check in Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier allows attackers with Item/Read permission to read the Pipeline replay scripts of jobs they can access...

foreman-mcp-server Inserts Sensitive Information into Log File

A flaw was found in foreman-mcp-server. This component utilizes two distinct logging mechanisms that can expose sensitive session and authentication data. One mechanism logs session identifiers, which are treated as authentication credentials, at an informational level. The other, when debug...

Insertion of Sensitive Information into Log File

Overview foreman-mcp-server is a MCP server for Foreman host management and infrastructure automation Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File via the sanitizeheaders method in logging.py, which used a denylist approach to redact sensiti...

GHSA-7RCJ-2493-83X3 foreman-mcp-server Inserts Sensitive Information into Log File

A flaw was found in foreman-mcp-server. This component utilizes two distinct logging mechanisms that can expose sensitive session and authentication data. One mechanism logs session identifiers, which are treated as authentication credentials, at an informational level. The other, when debug...

CVE-2026-9073

A flaw was found in foreman-mcp-server. This component utilizes two distinct logging mechanisms that can expose sensitive session and authentication data. One mechanism logs session identifiers, which are treated as authentication credentials, at an informational level. The other, when debug...

CVE-2026-12112

A flaw was found in the foreman-mcp-server. A session management vulnerability in the MCP Server allows unauthenticated attackers to hijack active administrative sessions due to an improper cache of authenticated client connections, by trusting a non-secret session ID without re-validating...

CVE-2026-9073 Foreman-mcp-server: mcp server: insecure sensitive http header sanitization

A flaw was found in foreman-mcp-server. This component utilizes two distinct logging mechanisms that can expose sensitive session and authentication data. One mechanism logs session identifiers, which are treated as authentication credentials, at an informational level. The other, when debug...