CVE-2026-77366 (GCVE-0-2026-77366)
Vulnerability from cvelistv5 – Published: 2026-10-12 17:54 – Updated: 2026-10-13 15:14
VLAI
EPSS
VEX
Title
obsidian-tc tokens can access arbitrary configured vaults
Summary
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, tool dispatch does not compare the caller-controlled input.vault value with the vault bound to the caller, the JSON Web Token (JWT) has no vault claim, and the folder access-control list is shared globally. Any valid token can therefore select another configured vault and read, write, or delete its contents through affected tools. Version 1.3.1 fixes the vulnerability by binding tokens and request context to a vault and rejecting mismatched input.vault values before scope checks.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 15:14 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/The-40-Thieves/obsidian-tc/sec… | x_refsource_CONFIRM |
| https://github.com/The-40-Thieves/obsidian-tc/pull/72 | x_refsource_MISC |
| https://github.com/The-40-Thieves/obsidian-tc/com… | x_refsource_MISC |
| https://github.com/The-40-Thieves/obsidian-tc/rel… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| The-40-Thieves | obsidian-tc |
Affected:
< 1.3.1
|
guessed |
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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