MongoDB 7.0 (pre-7.0.32) | 2dsphere_bucket Index Crash on Non-TS Buckets
CVE-2026-8843 Published on May 18, 2026
Calling createIndex with certain index types can crash mongod
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
Vulnerability Analysis
CVE-2026-8843 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an assertion failure Vulnerability?
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
CVE-2026-8843 has been classified to as an assertion failure vulnerability or weakness.
Products Associated with CVE-2026-8843
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Affected Versions
MongoDB, Inc. MongoDB Server:- Version 7.0 and below 7.0.32 is affected.
- Version 8.0 and below 8.0.21 is affected.
- Version 8.2 and below 8.2.6 is affected.