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CVE-2026-19503

Insufficient OIDC endpoint validation could invoke unintended local protocol handlers

MEDIUM
6.5
CVSS Score
Published: August 12, 2026 at 08:17 PM UTC
Updated: September 29, 2026 at 09:02 PM UTC
2 products affected across 1 vendorAtlas SQL ODBC DriverSQL Schema Builder Cli

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Atlas SQL ODBC Driver· MongoDB
95%
1.0.0 ≤ v < 2.0.91.0.0
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
SQL Schema Builder Cli· MongoDB
95%
1.0.1 ≤ v < 1.2.11.0.1
Affected range stops below 1.2.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Product
Source: cverecord
https://www.mongodb.com/docs/sql-interface/changelog

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-20

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