Medium severity · published Aug 12, 2026
CVE-2026-19503
Insufficient OIDC endpoint validation could invoke unintended local protocol handlers
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
1.0.0 before 2.0.9 · source: vendor
OD
Odbc Driver · Mongodb
1.0.0 before 2.0.9 · source: NVD
SS
Sql Schema Builder Cli · Mongodb
1.0.1 before 1.2.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19503
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19503
Product
https://www.mongodb.com/docs/sql-interface/changelog
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