Medium severity · published Oct 13, 2026
CVE-2026-77361
obsidian-tc symlink path mismatch bypasses read ACL restrictions
4.7
CVSS
0.1%
EPSS
No
On KEV
Description
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, read access-control list (ACL) checks use a lexical vault-relative path while containment checks use the resolved path. An in-vault symlink under an allowed glob that resolves into a denied folder can therefore bypass the read ACL and expose files in the denied folder. Exploitation requires an out-of-band-planted symlink and does not permit an escape from the vault root. Version 1.3.1 fixes the vulnerability by applying ACL checks to the resolved vault-relative path.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OB
obsidian-tc · The-40-Thieves
< 1.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77361
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77361
x_refsource_CONFIRM
https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682
x_refsource_MISC
https://github.com/The-40-Thieves/obsidian-tc/pull/76
x_refsource_MISC
https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920
x_refsource_MISC
https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
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