CVE-2026-8843 HIGH

CVE-2026-8843: Calling createIndex with certain index types can crash mongod

Vendor Mongodb, Inc.
Product MongoDB Server
Weakness CWE-617
Published May 18, 2026
Last update May 19, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Creating a "2dsphere_bucket" index on a non-timeseries bucket collection will succeed, but any subsequent attempt to insert a document which triggers updating that index will crash the server. A similar issue occurs when creating "queryable_encrypted_range" indices. This issue affects MongoDB Server v7.0 versions prior to 7.0.32, v8.0 versions prior to 8.0.21 and v8.2 versions prior to 8.2.6

Key dates

02Disclosure timeline

May 18, 2026 CVE published
May 19, 2026 Record updated