GHSA-vmp7-252j-cwp7: @zereight/mcp-gitlab: DNS rebinding reaches local Streamable HTTP MCP transport
HIGHCritical vulnerability — CVSS 9.6
What to do
- Critical severity — schedule an urgent patch.
`@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 headers and reaches the MCP initialization path instead of rejecting the request at the HTTP boundary. This is CWE-350, Reliance on Reverse DNS Resolution for a Security-Critical Action. …
CVE · detail
- CVE-2026-61568nvd ↗EPSS 0.32%
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