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CVE-2026-77362— obsidian-tc bridge tools expose data outside the read ACL

Quick assessment

Affected
The-40-Thieves obsidian-tc
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

obsidian-tc 是一个为 Obsidian 知识库提供支持的、受控且支持智能体调用的 Model Context Protocol（MCP）服务器。在版本 1.3.1 之前，其桥接工具未能一致地对返回的每个字段应用读取访问控制列表（ACL）。具体而言： 工具会暴露源自被拒绝访问笔记的分组统计信息； 会将未过滤的相邻结果字段透传； 工具会在未经读取白名单检查的情况下暴露模板路径及解析后的用户函数体。因此，经身份验证的调用方有可能推断或读取超出其读取 ACL 权限范围的笔记数据。版本 1.3.1 通过过滤可关联

CVSS 4.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
The-40-Thieves obsidian-tc < 1.3.1 affected
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I. Basic Information for CVE-2026-77362

Vulnerability Information
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Vulnerability Title
obsidian-tc bridge tools expose data outside the read ACL
Source: CVE Program / CVE List V5
Vulnerability Description
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, bridge tools do not consistently apply the read access-control list (ACL) to every returned field. The tasks_filter tool exposes group counts derived from denied notes, makemd_query passes unfiltered sibling result fields through, and list_templates exposes template paths and parsed user-function bodies without a read-whitelist check. An authenticated caller can consequently infer or read data from notes outside the caller's read ACL. Version 1.3.1 fixes the vulnerability by filtering path-attributable fields and applying the read whitelist to list_templates.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
The-40-Thieves obsidian-tc < 1.3.1 -

II. Public POCs for CVE-2026-77362

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III. Intelligence Information for CVE-2026-77362

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Patches & Fixes for CVE-2026-77362 (2)

Vendor Advisories for CVE-2026-77362 (1)

Proof of Concept for CVE-2026-77362 (1)

IV. Related Vulnerabilities

Same product: obsidian-tc
Same vendor: The-40-Thieves
Same weakness: CWE-200

V. Comments for CVE-2026-77362

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