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    2 vulnerabilities found for obsidian-web-mcp by jimprosser

    CVE-2026-54618 (GCVE-0-2026-54618)

    Vulnerability from nvd – Published: 2026-09-17 19:45 – Updated: 2026-09-24 20:40
    VLAI
    Title
    Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user
    Summary
    Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0.
    Severity
    9.4 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 20:40 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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                "id": "CVE-2026-54618",
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        ],
        "title": "CISA ADP Vulnrichment"
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    CVE-2026-54618 (GCVE-0-2026-54618)

    Vulnerability from cvelistv5 – Published: 2026-09-17 19:45 – Updated: 2026-09-24 20:40
    VLAI
    Title
    Obsidian Web MCP: Unauthenticated vault access: /oauth/authorize auto-approves without authenticating the user
    Summary
    Obsidian Web MCP is a secure remote MCP server for Obsidian vaults. Prior to 0.2.0, /oauth/authorize issues an authorization code without a login, consent, or session check, and /oauth/token can exchange that code for the static VAULT_MCP_TOKEN without authenticating a client. An unauthenticated remote caller who can reach the intended tunnel deployment can therefore call /mcp and use vault_read, vault_write, vault_search, vault_list, vault_move, and vault_delete against the entire vault. Optional PKCE does not prevent an attacker-initiated flow, and unauthenticated /oauth/register also exposes a client_credentials path by returning the configured VAULT_OAUTH_CLIENT_SECRET. This issue is fixed in version 0.2.0.
    Severity
    9.4 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: total
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-24 20:40 UTC
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    • CWE-522 - Insufficiently Protected Credentials
    • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
    Assigner
    References
    Impacted products
    Show details on NVD website
    To clipboard 

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