Is CVE-2026-19503 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-19503?

CVE-2026-19503 has a CVSS v3 severity of MEDIUM (4.8).

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CVE-2026-19503

Description

MongoDB Schema Manager and MongoDB Atlas SQL ODBC Driver do not validate the scheme of the authorization and token endpoints returned by an OIDC issuer's discovery document. A user induced to connect to an uncontrolled MongoDB deployment using MONGODB-OIDC authentication may have an uncontrolled URI dispatched to their operating system's default protocol handler, potentially exposing credentials or, under certain conditions, resulting in code execution in the user's context.