CVE-2026-19503Network attack vector

Credential exposure or code execution via unvalidated schemes

Published Aug 12, 2026 · Updated Aug 12, 2026

Improper OIDC endpoint validation in affected MongoDB SQL clients allows remote attackers to expose credentials or execute code. In ODBC Driver 1.0.0 through 2.0.8 and Schema Builder CLI 1.0.1 through 1.2.0, discovery endpoints accept non-HTTPS schemes and reach the OS handler. Exploitation requires a user-initiated MONGODB-OIDC connection to an attacker-controlled deployment; the resulting handler runs with that user's privileges.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper OIDC endpoint validation in affected MongoDB SQL clients allows remote attackers to expose credentials or execute code. In ODBC Driver 1.0.0 through 2.0.8 and Schema Builder CLI 1.0.1 through 1.2.0, discovery endpoints accept non-HTTPS schemes and reach the OS handler. Exploitation requires a user-initiated MONGODB-OIDC connection to an attacker-controlled deployment; the resulting handler runs with that user's privileges.

The record

CVE
CVE-2026-19503
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
MongoDB
Product
MongoDB SQL Schema Builder CLI
Classifications
CWE-20, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.1 <1.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MongoDB · MongoDB SQL Schema Builder CLIversion=1.0.1 <1.2.1
MongoDB · MongoDB Atlas SQL ODBC Driverversion=1.0.0 <2.0.9

Published CVSS scores

5.9MongoDB, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
6.3MongoDB, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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