Characterizing Network Centralization and Observability in the Remote MCP Ecosystem

The Model Context Protocol MCP has emerged as the dominant interface for connecting autonomous agents to external data sources and execution environments. The ecosystem's transition from local process execution to remote Streamable HTTP deployments introduces unmeasured architectural and security...

CVE-2026-61568

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

CVE-2026-61568 @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

CVE-2026-61568 @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

CVE-2026-61568 @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

EUVD-2026-79999

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

GHSA-VMP7-252J-CWP7 @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

@zereight/mcp-gitlab exposes its Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preserving an attacker-controlled Host and Origin. The server accepts those...

@zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport

@zereight/mcp-gitlab exposes its Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preserving an attacker-controlled Host and Origin. The server accepts those...

CVE-2026-54547

Meta Ads MCP is a Model Context Protocol MCP server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in metaadsmcp/core/httpauthintegration.py rejects HTTP MCP requests only when both authtoken and pipeboardtoken are absent, while extracttokenfromheaders doe...

CVE-2026-54549 Meta Ads MCP: Server-Side Request Forgery (SSRF) in `upload_ad_image` via Unrestricted `image_url` Fetch

Meta Ads MCP is a Model Context Protocol MCP server that lets AI assistants run Meta Ads. Prior to version 1.0.115, the uploadadimage tool in metaadsmcp/core/ads.py passes an attacker-controlled imageurl to trymultipledownloadmethods in metaadsmcp/core/utils.py, where httpx.AsyncClient uses...

CVE-2026-54547 Meta Ads MCP: X-Pipeboard-Token Header Auth Bypass Reuses Operator Meta Token

Meta Ads MCP is a Model Context Protocol MCP server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in metaadsmcp/core/httpauthintegration.py rejects HTTP MCP requests only when both authtoken and pipeboardtoken are absent, while extracttokenfromheaders doe...

EUVD-2026-78886

Meta Ads MCP is a Model Context Protocol MCP server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in metaadsmcp/core/httpauthintegration.py rejects HTTP MCP requests only when both authtoken and pipeboardtoken are absent, while extracttokenfromheaders doe...

CVE-2026-61568: Reliance on Reverse DNS Resolution for a Security-Critical Action

@zereight/mcp-gitlab is a Model Context Protocol server for GitLab. Versions prior to 2.1.30 expose the Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preservin...

CVE-2026-54547: Improper Authentication

Meta Ads MCP is a Model Context Protocol MCP server that lets AI assistants run Meta Ads. Prior to version 1.0.115, AuthInjectionMiddleware in metaadsmcp/core/httpauthintegration.py rejects HTTP MCP requests only when both authtoken and pipeboardtoken are absent, while extracttokenfromheaders doe...

PT-2026-93173

@zereight/mcp-gitlab exposes its Streamable HTTP MCP endpoint without an effective Host or Origin allowlist. A malicious web page can use DNS rebinding to route browser requests to a victim's local MCP listener while preserving an attacker-controlled Host and Origin. The server accepts those...

CVE-2026-42559

CVE-2026-42559 — DNS rebinding in the rmcp Streamable HTTP server transport A self-contained Docker lab and Python proof of concept for CVE-2026-42559 GHSA-89vp-x53w-74fx / RUSTSEC-2026-0189...

Chainlist has SSRF via MCP SSE and streamable-http transports that allows unauthenticated internal network access

Am I affected?Only if your deployment sets features.mcp.enabled = true in .chainlit/config.toml. MCP has been disabled by default since v2.7.0, so most Chainlit deployments are not affected. No authentication is required: /mcp is reachable by any client that can open a session. SummaryWhen MCP is...

Denial Of Service (DoS)

Spring AI is vulnerable to Denial of Service DoS. The vulnerability is due to the MCP Streamable HTTP server transport retaining an unbounded number of unauthenticated sessions, which allows a remote attacker to exhaust server memory over time and ultimately cause a denial of service affecting...

Exploit for CVE-2026-42559

CVE-2026-42559 — DNS rebinding in the rmcp Streamable HTTP s...

SUSE CVE-2026-55637

genieacs-mcp is an MCP server for GenieACS written in Go. Prior to 0.3.2, the Streamable HTTP transport in cmd/server/main.go creates an unauthenticated /mcp listener on the default MCPLISTENADDR value 127.0.0.1:8080 when MCPAUTHTOKEN is unset and the httpSrv.Startaddr branch does not validate th...