CVE-2026-13077

A missing bounds check in the BSON CodeWScope element accessors allows an attacker to trigger an out-of-bounds heap read via a crafted aggregation pipeline. The vulnerability can be exploited by an authenticated user by generating a malformed BSONColumn data containing a CodeWScope element, bypassing wire-level BSON validation. When the forged element is decompressed, the unchecked size value is used in pointer arithmetic, causing either a server crash or disclosure of adjacent heap memory contents.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://jira.mongodb.org/browse/SERVER-129103	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mongodb:mongodb::::::::
	cpe:2.3:a:mongodb:mongodb::::::::
	cpe:2.3:a:mongodb:mongodb::::::::
	cpe:2.3:a:mongodb:mongodb::::::::

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Una comprobación de límites faltante en los accesores del elemento BSON CodeWScope permite a un atacante activar una lectura de pila fuera de límites a través de una pipeline de agregación manipulada. La vulnerabilidad puede ser explotada por un usuario autenticado generando datos BSONColumn malformados que contengan un elemento CodeWScope, eludiendo la validación BSON a nivel de cable. Cuando el elemento falsificado es descomprimido, el valor de tamaño no verificado se utiliza en aritmética de punteros, causando un fallo del servidor o la divulgación del contenido de la memoria de pila adyacente.

Information

Published : 2026-07-22 20:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-13077

Mitre link : CVE-2026-13077

CVE.ORG link : CVE-2026-13077

JSON object : View

Products Affected

mongodb

mongodb

CWE

CWE-125

Out-of-bounds Read

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