https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 07 Oct 2026 20:37:32 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-328452 EUVD-2026-328452 https://cve.radiocsirt.org/vuln/euvd-2026-328452 https://cve.radiocsirt.org/vuln/fkie_cve-2026-11717 <p>An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox.</p> <p>When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the response into an introspectResp struct where the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil &amp;&amp; !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the &#34;active&#34; field, granting access to protected tools and underlying data sources.</p> <p>An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox.</p> <p>When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the response into an introspectResp struct where the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil &amp;&amp; !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the &#34;active&#34; field, granting access to protected tools and underlying data sources.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-11717 https://cve.radiocsirt.org/vuln/ghsa-8fcc-w5hv-4gxv <p><strong>Affected:</strong> Go: github.com/googleapis/mcp-toolbox</p> <p>An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox.</p> <p>When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the response into an introspectResp struct where the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil &amp;&amp; !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the &#34;active&#34; field, granting access to protected tools and underlying data sources.</p> <p><strong>Affected:</strong> Go: github.com/googleapis/mcp-toolbox</p> <p>An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox.</p> <p>When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the response into an introspectResp struct where the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil &amp;&amp; !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the &#34;active&#34; field, granting access to protected tools and underlying data sources.</p> https://cve.radiocsirt.org/vuln/ghsa-8fcc-w5hv-4gxv