GHSA-c5xx-h28h-f682
obsidian-tc : Symlink read-ACL scope bypass via lexical path checks
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | obsidian-tc | < 1.3.1 | 1.3.1 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
ACL checks ran on the lexical vault-relative path while containment used the realpath. An in-vault symlink placed under an allowed glob, whose realpath resolved into a denied folder, passed the read ACL — an intra-vault read-ACL-scope bypass. It requires an out-of-band-planted symlink (no MCP tool creates one) and is not a vault-root escape.
### Patches
Fixed in **1.3.1**. Upgrade to `>= 1.3.1`. ACL enforcement now derives the realpath vault-relative path and feeds a single unified predicate at every site.
### Workarounds
Do not permit untrusted symlinks inside the vault.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-c5xx-h28h-f682
- https://github.com/The-40-Thieves/obsidian-tc/pull/76
- https://github.com/The-40-Thieves/obsidian-tc/commit/c81d1687e2cfec98a0d8bc5038c029f41ea9c920
- https://github.com/The-40-Thieves/obsidian-tc
- https://github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1
- https://nvd.nist.gov/vuln/detail/cve-2026-77361