CVE-2026-77366 obsidian-tc - Broken Access Control

obsidian-tc < 1.3.1 contains a broken access control vulnerability caused by lack of vault claim in JWT and global folder access-control list, letting attackers with valid tokens read, write, or delete contents of other vaults, exploit requires valid token.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.31% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Update to version 1.3.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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