CVE-2026-19503

MEDIUM

Insufficient OIDC endpoint validation could invoke unintended local protocol handlers

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-19503 has a selected CVSS score of 6.3 (medium).

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.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 13, 2026 · Source: CVE List

Affected products and versions

2
ProductSourceVersion range

Atlas SQL ODBC Driver

Browse MongoDB / Atlas SQL ODBC Driver

Default status: unaffected

CVE List1.0.0 to < 2.0.9affected

Schema Builder CLI

Browse MongoDB / Schema Builder CLI

Default status: unaffected

CVE List1.0.1 to < 1.2.1affected

References

2