GHSA-vwxw-jrg6-9jxv
Suggest an improvement- Source
- https://github.com/advisories/GHSA-vwxw-jrg6-9jxv
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-vwxw-jrg6-9jxv/GHSA-vwxw-jrg6-9jxv.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-vwxw-jrg6-9jxv
- Aliases
- Published
- 2026-06-29T18:31:55Z
- Modified
- 2026-09-10T15:25:39Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- MCP Toolbox HTTP tool path parameters allow traversal to unintended endpoints
- Details
-
A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox.
When constructing downstream API requests, the URL builder substitutes user-controlled pathParams into the configured tool path and parses the resulting string as a relative URL. While it checks that the input does not alter the scheme, host, or user info, it relies on ResolveReference for the final URL resolution. Because dot segments (../) are normalized during this resolution step, an attacker can supply path parameters containing directory traversal sequences to escape the operator-configured path scope. This allows the client to coerce the toolbox into making requests to unintended endpoints on the same target host while forwarding the toolbox's configured credentials (e.g., bypassing a restricted path like /api/v1/users/{{.id}} to reach /admin/secrets).
- Database specific
{ "cwe_ids": [ "CWE-22" ], "github_reviewed": true, "github_reviewed_at": "2026-09-04T19:21:10Z", "nvd_published_at": "2026-06-29T18:16:36Z", "severity": "CRITICAL" }- References
Affected packages
Go / github.com/googleapis/mcp-toolbox
Package
- Name
- github.com/googleapis/mcp-toolbox
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/googleapis/mcp-toolbox