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Advisory record · GHSA-c5xx-h28h-f682

obsidian-tc : Symlink read-ACL scope bypass via lexical path checks

CVSS 4.7 MediumEPSS 0.0011 · 1st percentile

Published by the GitHub Advisory Database at 23 Oct 2026, 17:28 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
obsidian-tcnpm<1.3.11.3.1
Identifiers
GHSA-c5xx-h28h-f682 · CVE-2026-77361
Weakness (CWE)
CWE-59 · CWE-863
Tags
Published
23 Oct 2026
Updated
23 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-c5xx-h28h-f682 affects the npm package obsidian-tc before version 1.3.1. The read access control checked the lexical vault-relative path while containment used the resolved realpath, so a symlink inside the vault placed under an allowed path could reach a denied folder that its target resolved into. Exploiting this requires a symlink planted outside the tool's normal operation, since no MCP tool creates one, and it does not allow escape from the vault root. Upgrade to obsidian-tc 1.3.1 or later, and avoid allowing untrusted symlinks inside the vault.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
4.7 Medium 3.1 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0011, the 1st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.