CVE-2026-77366 json
obsidian-tc tokens can access arbitrary configured vaults
published 30d ago modified 19d ago also GHSA-84c9-qqpq-2pq5 , EUVD-2026-97737
- cvss
- 9.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
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.
Patch / fix
- npm obsidian-tc 1.3.1
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 29d ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| GitHub | 3.1 | 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | obsidian-tc | <1.3.1 |
1.3.1 |
Affected products
- The-40-Thieves obsidian-tc
Classification
References
-
github.com
/The-40-Thieves/obsidian-tc/pull/72
web
-
github.com
/The-40-Thieves/obsidian-tc/commit/38b4992e87dc2715564236e1a42d005ab05a0194
web
-
github.com
/The-40-Thieves/obsidian-tc/security/advisories/GHSA-84c9-qqpq-2pq5
web
-
github.com
/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
web
-
github.com
/The-40-Thieves/obsidian-tc
package
-
nvd.nist.gov
/vuln/detail/cve-2026-77366
advisory
Sources
- CVE List CVE-2026-77366
- GitHub Advisory GHSA-84c9-qqpq-2pq5
- NVD CVE-2026-77366
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