CVE-2026-77363High· 8.8▾ Twilightobsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, the Streamable HTTP transport does not validate the Host or Origin header or enable DNS-rebinding protection. When the documented l…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, the Streamable HTTP transport does not validate the Host or Origin header or enable DNS-rebinding protection. When the documented loopback configuration uses auth.mode set to none, a malicious web page can send requests to the local MCP endpoint and receive unrestricted vault access through the http-local caller. Version 1.3.1 fixes the vulnerability by enabling host, origin, and DNS-rebinding validation.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
obsidian-tc < 1.3.1Patched in:
obsidian-tc 1.3.1Connected by shared product, vendor, weakness, or advisory.
CVE-2026-77362Medium· 4.3obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults
CVE-2026-77361Medium· 4.7obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults
CVE-2026-77366Critical· 9.9obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults
CVE-2026-77364Medium· 6.5obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults
CVE-2026-115477High· 7.1obsidian-tc: Declined human-in-the-loop confirmations can permit destructive calls over HTTP
CVE-2026-115478High· 7.1obsidian-tc: Memory-lifecycle tools overwrite unowned notes or partially commit lifecycle changes