MCP Go SDK security vulnerabilities

MCP Go SDK is an open-source development toolkit for the Model Context Protocol. Versions of MCP Go SDK prior to 1.4.0 contained security vulnerabilities. These vulnerabilities stemmed from the default lack of DNS rebinding protection, allowing malicious websites to bypass the same-origin policy...

CVE-2026-34742: Initialization of a Resource with an Insecure Default

The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.0, the Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or...

CVE-2026-34877: Execution with Unnecessary Privileges

An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is cause...

Zabbix 6.0.x < 6.0.41 / 7.0.x < 7.0.19 / 7.2.x < 7.2.13 / 7.4.x < 7.4.3 Information Disclosure (ZBX-27638)

The version of Zabbix Server installed on the remote host is prior to 6.0.41, 7.0.19, 7.2.13, 7.4.3. It is, therefore, affected by an information disclosure vulnerability : - Zabbix Server/Proxy reuses JavaScript Duktape contexts for performance reasons. This can lead to confidentiality loss wher...

GHSA-W2FM-25VW-VH7F mcp-handler has a tool response leak across concurrent client sessions ('Race Condition')

mcp-handler versions prior to 1.1.0 accepted @modelcontextprotocol/sdk =1.26.0, which contains the fix for CVE-2026-25536. Workarounds - Upgrade @modelcontextprotocol/sdk to =1.26.0 note: the SDK will throw on transport reuse, which will break mcp-handler 1.1.0 which effectively forces the upgrad...

mcp-handler has a tool response leak across concurrent client sessions ('Race Condition')

mcp-handler versions prior to 1.1.0 accepted @modelcontextprotocol/sdk =1.26.0, which contains the fix for CVE-2026-25536. Workarounds - Upgrade @modelcontextprotocol/sdk to =1.26.0 note: the SDK will throw on transport reuse, which will break mcp-handler 1.1.0 which effectively forces the upgrad...

CVE-2025-66486

IBM Aspera Shares 1.9.9 through 1.11.0 is vulnerable to HTML injection. A remote attacker could inject malicious HTML code, which when viewed, would be executed in the victim's Web browser within the security context of the hosting site...

dbgate-web: Stored XSS in applicationIcon leads to potential RCE in Electron due to unsafe renderer configuration

Summary A stored XSS vulnerability exists in DbGate because attacker-controlled SVG icon strings are rendered as raw HTML without sanitization. In the web UI this allows script execution in another user's browser; in the Electron desktop app this can escalate to local code execution because...

GHSA-35XM-QVJG-8M42 dbgate-web: Stored XSS in applicationIcon leads to potential RCE in Electron due to unsafe renderer configuration

Summary A stored XSS vulnerability exists in DbGate because attacker-controlled SVG icon strings are rendered as raw HTML without sanitization. In the web UI this allows script execution in another user's browser; in the Electron desktop app this can escalate to local code execution because...

CI4MS: Logs Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

Summary Vulnerability: Stored DOM Blind XSS via Logs Interface Rendering Administrative Context Execution - Stored Cross-Site Scripting Blind XSS via Unsafe Rendering of User-Controlled Logged Data Description The application renders user-controlled input unsafely within the logs interface. If an...

GHSA-R4V5-RWR2-Q7R4 CI4MS: Logs Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

Summary Vulnerability: Stored DOM Blind XSS via Logs Interface Rendering Administrative Context Execution - Stored Cross-Site Scripting Blind XSS via Unsafe Rendering of User-Controlled Logged Data Description The application renders user-controlled input unsafely within the logs interface. If an...

DNS Rebinding Protection Disabled by Default in Model Context Protocol Go SDK for Servers Running on Localhost

The Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or SSEHandler, a malicious website could exploit DNS rebinding to bypass same-origi...

GHSA-XW59-HVM2-8PJ6 DNS Rebinding Protection Disabled by Default in Model Context Protocol Go SDK for Servers Running on Localhost

The Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or SSEHandler, a malicious website could exploit DNS rebinding to bypass same-origi...

acetone-nnet (>=0.1.0.dev2, <=0.4.0.dev1), acuity (6.18.0) +513 more potentially affected by CVE-2026-34445 via onnx (>=1.1.1, <=1.20.1)

onnx PYPI version =1.1.1, =0.1.0.dev2, =6.6.0, =0.3.0, =0.1.0, =0.0.0, =1.0.1, =0.0.8, =0.1.0, =2.0.0, =1.31.1, =2.9.0 and more Source cves: CVE-2026-34445 Source advisory: OSV:PYSEC-2026-2240...

CVE-2026-34163

FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP Model Context Protocol tools endpoints /api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the...

CVE-2026-4399

Prompt injection vulnerability in 1millionbot Millie chatbot that occurs when a user manages to evade chat restrictions using Boolean prompt injection techniques formulating a question in such a way that, upon receiving an affirmative response 'true', the model executes the injected instruction,...

CVE-2026-29870

A directory traversal vulnerability in the agentic-context-engine project versions up to 0.7.1 allows arbitrary file writes via the checkpointdir parameter in OfflineACE.run. The savetofile method in ace/skillbook.py fails to normalize or validate filesystem paths, allowing traversal sequences to...

PT-2026-29672

Name of the Vulnerable Software and Affected Versions Go MCP SDK versions prior to 1.4.0 Description The Go MCP SDK, utilizing Go's standard encoding/json, did not enable DNS rebinding protection by default for HTTP-based servers prior to version 1.4.0. When an HTTP-based MCP server was run on...

GHSA-RX4H-526Q-4458 SiYuan: Stored XSS in Attribute View Gallery/Kanban Cover Rendering Allows Arbitrary Command Execution in Desktop Client

Summary An attacker who can place a malicious URL in an Attribute View mAsse field can trigger stored XSS when a victim opens the Gallery or Kanban view with “Cover From - Asset Field” enabled. The vulnerable code accepts arbitrary https URLs without extensions as images, stores the...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection in the process that renders the Gallery or Kanban view when a malicious URL is stored in the mAsset field and used as a cover image. An attacker can execute arbitrary operating system commands under the victim's...