CVE-2026-8053

FlatBSON Duplicate Field Index Drift

CVE-2026-8053 is fixed in MongoDB on 1 platform by MongoDB 8.3.2 (version 8.3.2), released May 12, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
8.7
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0066
51st percentile

An issue in MongoDB Server's time-series collection implementation allows an authenticated user with database write privileges to trigger an out-of-bounds memory write in the mongod process. The issue results from an inconsistency in the internal field-name-to-index mapping within the time-series bucket catalog. Under certain conditions this can result in arbitrary code execution. This issue impacts MongoDB Server v5.0 versions prior to 5.0.33, v6.0 versions prior to 6.0.28, v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Where it's fixed

ProductFixed inFixReleased
Windows apps
MongoDB 8.3.2 MongoDB 8.3.2 May 12, 2026

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