EUVD-2026-57607
GHSA-fjxq-47rx-gwhh
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
AC:H because attacker must control or impersonate the server; UI:R for required client-initiated connection; S:C because heap overflow in driver can affect the broader application process.
Primary rating from Vendor (mongodb).
CVSS VectorVendor: mongodb
Lifecycle Timeline
4DescriptionCVE.org
An application using the MongoDB BI Connector ODBC Driver may experience a memory-safety issue when processing output parameters from a stored procedure. Triggering this issue requires connecting to an untrusted or impersonated database server that returns crafted metadata. This may result in process termination, disclosure of process memory, or, under certain conditions, arbitrary code execution.
AnalysisAI
Heap-based buffer overflow in the MongoDB BI Connector ODBC Driver enables process memory disclosure, process termination, or arbitrary code execution when an application processes crafted stored procedure output parameter metadata returned by a malicious or impersonated database server. All versions prior to v1.4.9 are affected (CPE: cpe:2.3:a:mongodb:bi_connector_odbc_driver:*:*:*:*:*:*:*:*), and the attack does not require privileges against the driver itself, though the attacker must control or impersonate the upstream database server. MongoDB has released a patched version (v1.4.9) that adds buffer-clamping logic to prevent the overflow; no public exploit has been identified at time of analysis.
Technical ContextAI
The MongoDB BI Connector ODBC Driver (CPE: cpe:2.3:a:mongodb:bi_connector_odbc_driver:*:*:*:*:*:*:*:*) enables BI tools such as Tableau, Excel, and other ODBC-compatible clients to query MongoDB via a SQL interface. The vulnerability is classified as CWE-122 (Heap-based Buffer Overflow): when the driver processes output parameters returned by a stored procedure call, it fails to validate or clamp the buffer size indicated by server-supplied metadata, allowing an attacker-controlled server to specify an oversized length value that causes a write beyond the allocated heap region. The fix in v1.4.9 explicitly adds clamping logic for parameter sizes in client-app integrations. The CVSS 4.0 vector (AV:N/AC:H/AT:P/PR:N/UI:A) reflects a network-reachable but constrained attack path: AT:P requires a specific attack precondition (server control or MITM positioning) and UI:A requires the client application to actively initiate a connection to the untrusted server and invoke a stored procedure.
RemediationAI
The primary remediation is to upgrade the MongoDB BI Connector ODBC Driver to version 1.4.9 or later, which includes the 'logic to clamp buffers' that directly addresses CVE-2026-19004. The patched release is available at https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9. As an immediate compensating control prior to patching, restrict ODBC driver connections exclusively to trusted, internally managed and certificate-verified database servers, and block connections to any externally hosted or unverified MongoDB BI Connector endpoints - this mitigates the required attack precondition (server impersonation or MITM) but does not eliminate the underlying vulnerability. Enforcing TLS certificate pinning between ODBC clients and the BI Connector server can reduce MITM exposure at the cost of additional PKI infrastructure overhead. No patch-equivalent workaround exists; upgrading to v1.4.9 is the only confirmed remediation.
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Same weakness CWE-122 – Heap-based Buffer Overflow
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External POC / Exploit Code
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