{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55604", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T23:31:22.445Z", "datePublished": "2026-07-09T21:13:15.713Z", "dateUpdated": "2026-07-09T21:13:15.713Z"}, "containers": {"cna": {"title": "@arikusi/deepseek-mcp-server has an Authorization Bypass Through User-Controlled Key", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/arikusi/deepseek-mcp-server/security/advisories/GHSA-fh3r-g96v-f578", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/arikusi/deepseek-mcp-server/security/advisories/GHSA-fh3r-g96v-f578"}, {"name": "https://github.com/arikusi/deepseek-mcp-server/releases/tag/v1.7.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/arikusi/deepseek-mcp-server/releases/tag/v1.7.0"}], "affected": [{"vendor": "arikusi", "product": "deepseek-mcp-server", "versions": [{"version": ">= 1.4.2, < 1.7.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-09T21:13:15.713Z"}, "descriptions": [{"lang": "en", "value": "DeepSeek MCP Server is an MCP server for DeepSeek V4. Starting in version 1.4.2 and prior to version 1.7.0, the process-global `SessionStore` accepts caller-supplied `session_id` values without binding them to any authenticated principal or transport session. An attacker can enumerate active session IDs via `deepseek_sessions`, then reuse a victim-controlled `session_id` in `deepseek_chat` to retrieve and continue the victim's conversation context. Version 1.7.0 contains a patch."}], "source": {"advisory": "GHSA-fh3r-g96v-f578", "discovery": "UNKNOWN"}}}}

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