CVE-2026-14541
- Source
- https://cve.org/CVERecord?id=CVE-2026-14541
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-14541.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-14541
- Published
- 2026-07-31T01:48:39.019Z
- Modified
- 2026-08-12T03:51:13.720653925Z
- Severity
-
- 8.0 (High) 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/E:U CVSS Calculator
- Summary
- Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider
- Details
-
An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When a Google authService is initialized with mcpEnabled: true but lacks an explicitly defined audience or clientId, the ValidateMCPAuth pipeline for opaque tokens skips audience validation entirely. As a result, the toolbox will accept any valid Google OAuth access token—even those minted for unrelated ecosystem applications—granting unauthorized clients access to protected tools and data backends.
- Database specific
{ "cna_assigner": "Google", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/14xxx/CVE-2026-14541.json", "cwe_ids": [ "CWE-287" ] }- References
Affected packages
Git / github.com/googleapis/mcp-toolbox
Affected ranges
- Type
- GIT
- Repo
- https://github.com/googleapis/mcp-toolbox
- Events
-
IntroducedLast affected
- Database specific
-
Show details
{ "extracted_events": [ { "introduced": "1.4.0" }, { "last_affected": "1.4.0" } ], "source": [ "AFFECTED_FIELD", "CPE_STRING" ], "cpe": "cpe:2.3:a:google:mcp_toolbox_for_databases:1.4.0:*:*:*:*:*:*:*" }