CVE-2026-61568

{"id": "CVE-2026-61568", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.6, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "zereight", "product": "gitlab-mcp", "versions": [{"status": "affected", "version": "< 2.1.30"}]}]}], "published": "2026-09-15T21:16:41.570", "references": [{"url": "https://github.com/zereight/gitlab-mcp/commit/52207c6f5c0e7a39e9235d491225edbb562a0290", "source": "security-advisories@github.com"}, {"url": "https://github.com/zereight/gitlab-mcp/pull/555", "source": "security-advisories@github.com"}, {"url": "https://github.com/zereight/gitlab-mcp/releases/tag/v2.1.30", "source": "security-advisories@github.com"}, {"url": "https://github.com/zereight/gitlab-mcp/security/advisories/GHSA-vmp7-252j-cwp7", "source": "security-advisories@github.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-350"}]}], "descriptions": [{"lang": "en", "value": "`@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 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. Version 2.1.30 contains a patch."}], "lastModified": "2026-09-15T21:16:41.570", "sourceIdentifier": "security-advisories@github.com"}