GHSA-pqh8-4pj7-32xx

Suggest an improvement
Source
https://github.com/advisories/GHSA-pqh8-4pj7-32xx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-pqh8-4pj7-32xx/GHSA-pqh8-4pj7-32xx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-pqh8-4pj7-32xx
Aliases
Published
2026-10-23T18:29:02Z
Modified
2026-10-23T18:45:08Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
Summary
obsidian-tc HTTP transport lacks Origin/DNS-rebinding protection, enabling drive-by vault access on loopback
Details

Impact

The Streamable HTTP transport was constructed without enableDnsRebindingProtection/allowedHosts/allowedOrigins and performed no Origin-header validation. With the documented auth.mode: "none" loopback default, a drive-by web page could POST http://127.0.0.1/mcp and receive caller http-local with scopes ["*"] — full vault read/write — via DNS rebinding / a forged Origin.

Patches

Fixed in 1.3.1. Upgrade to >= 1.3.1. The transport now enables DNS-rebinding protection and allowed hosts/origins and returns HTTP 403 on an invalid Origin (per MCP 2025-11-25).

Workarounds

Do not expose the HTTP transport with auth.mode: "none"; require JWT auth, or bind to a non-loopback interface behind a proxy that validates Origin.

Database specific 
{
    "cwe_ids":  [
        "CWE-1385",
        "CWE-346"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-23T18:29:02Z",
    "nvd_published_at":  "2026-10-12T18:17:23Z",
    "severity":  "CRITICAL"
}
References

Affected packages

npm / obsidian-tc

Package

Name
obsidian-tc
View open source insights on deps.dev
Purl
pkg:npm/obsidian-tc

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.3.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-pqh8-4pj7-32xx/GHSA-pqh8-4pj7-32xx.json"