CVE-2026-9740

HIGH

Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow

Title source: cna

Description

A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.

References (1)

Core 1

Core References

https://jira.mongodb.org/browse/SERVER-125063

Scores

CVSS v3 7.5

EPSS 0.0027

EPSS Percentile 18.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-674

Status published

Products (5)

mongodb/mongodb 7.0.0 - 7.0.35

MongoDB/MongoDB Server 7.0.0 - 7.0.35

MongoDB/MongoDB Server 8.0.0 - 8.0.24

MongoDB/MongoDB Server 8.2.0 - 8.2.10

MongoDB/MongoDB Server 8.3.0 - 8.3.3

Published Jun 09, 2026

Tracked Since Jun 10, 2026