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CVE-2026-19503— Insufficient OIDC endpoint validation could invoke unintended local protocol handlers

Quick assessment

Affected
MongoDB Atlas SQL ODBC Driver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MongoDB Atlas SQL ODBC Driver是美国MongoDB公司的一个ODBC数据连接驱动程序。 MongoDB Atlas SQL ODBC Driver 1.0.0至2.0.9之前版本和MongoDB Schema Manager 1.0.1至1.2.1之前版本存在输入验证错误漏洞，该漏洞源于未验证OIDC签发者发现文档返回的授权和令牌端点方案，可能导致用户被诱导连接到不受控制的MongoDB部署时，将不受控制的URI发送至操作系统默认协议处理器，从而暴露凭据或在某些条件下导致代码执

CVSS 4.8 · Medium EPSS 0.20% · P10

Possible ATT&CK Techniques 2 AI

T1501 T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
MongoDB Atlas SQL ODBC Driver 1.0.0< 2.0.9 affected
MongoDB Schema Builder CLI 1.0.1< 1.2.1 affected
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I. Basic Information for CVE-2026-19503

Vulnerability Information
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Vulnerability Title
Insufficient OIDC endpoint validation could invoke unintended local protocol handlers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB Atlas SQL ODBC Driver 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB Atlas SQL ODBC Driver是美国MongoDB公司的一个ODBC数据连接驱动程序。 MongoDB Atlas SQL ODBC Driver 1.0.0至2.0.9之前版本和MongoDB Schema Manager 1.0.1至1.2.1之前版本存在输入验证错误漏洞，该漏洞源于未验证OIDC签发者发现文档返回的授权和令牌端点方案，可能导致用户被诱导连接到不受控制的MongoDB部署时，将不受控制的URI发送至操作系统默认协议处理器，从而暴露凭据或在某些条件下导致代码执
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB Atlas SQL ODBC Driver 1.0.0 ~ 2.0.9 -
MongoDB Schema Builder CLI 1.0.1 ~ 1.2.1 -

II. Public POCs for CVE-2026-19503

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III. Intelligence Information for CVE-2026-19503

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Vendor Pages for CVE-2026-19503 (1)

Same Patch Batch · MongoDB · 2026-08-12 · 7 CVEs total

CVE-2026-19001 9.8 CRITICAL MongoDB BI Connector ODBC driver may write outside an allocated buffer when handling overs
CVE-2026-19002 8.1 HIGH Crafted database metadata may cause memory corruption in MongoDB BI Connector ODBC Driver
CVE-2026-19004 8.1 HIGH MongoDB BI Connector ODBC Driver Memory-Safety Issue When Handling Stored Procedure Output
CVE-2026-19003 7.8 HIGH MongoDB BI Connector ODBC driver may write outside an allocated buffer when the setup dial
CVE-2026-18888 6.5 MEDIUM MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving lar
CVE-2026-19502 5.5 MEDIUM Insufficient redaction of sensitive configuration values in diagnostic output of MongoDB S

IV. Related Vulnerabilities

Same product: Atlas SQL ODBC Driver
Same vendor: MongoDB
Same weakness: CWE-20

V. Comments for CVE-2026-19503

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