CVE Explorer
CVE-2026-11717
An authentication bypass vulnerability exists in the generic opaque token validation path (validateOpaqueToken) of googleapis/mcp-toolbox.
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 != ni
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"MCP Toolbox for Databases (googleapis/mcp-toolbox)","vendor":"Google","versions":[{"lessThanOrEqual":"1.3.0","status":"affected","version":"1.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4653a4d38528ea6cf2398e168847995cab1e6b488de60c6ca3dce1bab5706aed · sha256:9decec7262674c1c… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4653a4d38528ea6cf2398e168847995cab1e6b488de60c6ca3dce1bab5706aed · sha256:9decec7262674c1c… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4653a4d38528ea6cf2398e168847995cab1e6b488de60c6ca3dce1bab5706aed · sha256:9decec7262674c1c… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://github.com/googleapis/mcp-toolbox/pull/3341"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4653a4d38528ea6cf2398e168847995cab1e6b488de60c6ca3dce1bab5706aed · sha256:9decec7262674c1c… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.