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    2 vulnerabilities by ankimcp

    CVE-2026-61546 (GCVE-0-2026-61546)

    Vulnerability from nvd – Published: 2026-10-28 21:40 – Updated: 2026-10-29 18:24
    VLAI
    Title
    AnkiMCP: DNS rebinding reaches unauthenticated local AnkiMCP HTTP tools
    Summary
    AnkiMCP is an Anki addon that implements an MCP server, enabling AI assistants to interact with the Anki flashcard application. Prior to version 0.21.0, `anki_mcp_server/mcp_server.py` globally disables FastMCP DNS-rebinding protection through `TransportSecuritySettings` with `enable_dns_rebinding_protection=False`, including for the default local Streamable HTTP listener. The defaults in `anki_mcp_server/config.py` enable `http_enabled` on `127.0.0.1:3141`, with an empty `http_path` selecting the root endpoint. No bearer token, API key, session secret, strict `Host` allowlist or strict `Origin` allowlist is enforced before `initialize`, `tools/list` and `tools/call` reach MCP dispatch. A victim who visits a malicious web page while Anki and the listener are running can have browser requests rebound to loopback, allowing the attacker to `initialize` MCP, enumerate tools, read the local collection, and perform enabled non-destructive note/deck creation or updates. The attacker needs neither LAN position nor a local process. Available operations depend on enabled tool filters; destructive tools are hidden unless `enabled_destructive_tools` is opted into, limiting deletion-level impact but not the exposed read/write operations. The reported harness confirms real MCP tool dispatch with substituted Anki bridge responses rather than demonstrating destructive changes to a real collection. Disabling protection for tunnels/proxies also disables it for the normal loopback configuration. This issue is fixed in version 0.21.0.
    Severity
    8.8 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-29 18:24 UTC
    CWE
    • CWE-346 - Origin Validation Error
    • CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7994 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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        "title": "CISA ADP Vulnrichment"
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    CVE-2026-61546 (GCVE-0-2026-61546)

    Vulnerability from cvelistv5 – Published: 2026-10-28 21:40 – Updated: 2026-10-29 18:24
    VLAI
    Title
    AnkiMCP: DNS rebinding reaches unauthenticated local AnkiMCP HTTP tools
    Summary
    AnkiMCP is an Anki addon that implements an MCP server, enabling AI assistants to interact with the Anki flashcard application. Prior to version 0.21.0, `anki_mcp_server/mcp_server.py` globally disables FastMCP DNS-rebinding protection through `TransportSecuritySettings` with `enable_dns_rebinding_protection=False`, including for the default local Streamable HTTP listener. The defaults in `anki_mcp_server/config.py` enable `http_enabled` on `127.0.0.1:3141`, with an empty `http_path` selecting the root endpoint. No bearer token, API key, session secret, strict `Host` allowlist or strict `Origin` allowlist is enforced before `initialize`, `tools/list` and `tools/call` reach MCP dispatch. A victim who visits a malicious web page while Anki and the listener are running can have browser requests rebound to loopback, allowing the attacker to `initialize` MCP, enumerate tools, read the local collection, and perform enabled non-destructive note/deck creation or updates. The attacker needs neither LAN position nor a local process. Available operations depend on enabled tool filters; destructive tools are hidden unless `enabled_destructive_tools` is opted into, limiting deletion-level impact but not the exposed read/write operations. The reported harness confirms real MCP tool dispatch with substituted Anki bridge responses rather than demonstrating destructive changes to a real collection. Disabling protection for tunnels/proxies also disables it for the normal loopback configuration. This issue is fixed in version 0.21.0.
    Severity
    8.8 (High)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-10-29 18:24 UTC
    CWE
    • CWE-346 - Origin Validation Error
    • CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7994 records in the last 180 days details
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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