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Vulnerabilities

Security fix · CVE-2026-77361

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

Published Oct 23, 2026 · catalog updated Oct 23, 2026 · obsidian-tc : Symlink read-ACL

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-77361. EPSS is 0.11%. Act only if a listed version of obsidian-tc : Symlink read-ACL is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (obsidian-tc : Symlink read-ACL).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.11%
Remediation
Version ranges on file
Affected products
npm obsidian-tc

### 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 . 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm obsidian-tc0 → 1.3.1
  • npm obsidian-tc< 1.3.1

How to fix CVE-2026-77361

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-77361. EPSS is 0.11%. Act only if a listed version of obsidian-tc : Symlink read-ACL is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.3.1, < 1.3.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-59: Link Following; CWE-863: Incorrect Authorization. EPSS 0.11%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 23, 2026 · GitHub Advisory Database

    Detected

    ### 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 .

  2. Oct 23, 2026 · GitHub Advisory Database

    Fix available

    obsidian-tc fixed in 1.3.1

  3. Oct 23, 2026 · GitHub Advisory Database

    Fix available

    obsidian-tc fixed in 1.3.1

  4. Oct 23, 2026 · GitHub Advisory Database

    Updated

    ### 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 .

Sources

  • CVE.orgVulnerability recordCVE-2026-77361

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-77361

    30-day exploitation probability 0.11%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-c5xx-h28h-f682

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

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-77361

    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.

    advisories.gitlab.com
  • OpenSSF OSV / OSV ScannerPackage advisoryGHSA-c5xx-h28h-f682

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

    osv.dev

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • GitLab Advisory DatabaseOct 27, 2026
  • CVE.orgOct 23, 2026
  • GitHub Advisory DatabaseOct 23, 2026
  • OpenSSF OSV / OSV ScannerOct 23, 2026