CVE-2026-77363: obsidian-tc Streamable HTTP transport permits cross-origin loopback vault access
The-40-Thieves · obsidian-tc
Affected: The-40-Thieves obsidian-tc · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 4% of scored CVEs
DescriptionCVE.org
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian vaults. Prior to 1.3.1, the Streamable HTTP transport does not validate the Host or Origin header or enable DNS-rebinding protection. When the documented loopback configuration uses auth.mode set to none, a malicious web page can send requests to the local MCP endpoint and receive unrestricted vault access through the http-local caller. Version 1.3.1 fixes the vulnerability by enabling host, origin, and DNS-rebinding validation.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- The-40-Thieves · obsidian-tc< 1.3.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- The-40-Thieves
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-77363 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-1385cwe.mitre.org
- github.com/The-40-Thieves/obsidian-tc/security/advisories/GHSA-pgithub.com
- github.com/The-40-Thieves/obsidian-tc/pull/74github.com
- github.com/The-40-Thieves/obsidian-tc/commit/6428bfe6fdfd43aa7b4github.com
- github.com/The-40-Thieves/obsidian-tc/releases/tag/v1.3.1github.com