What’s Vulnerable › Vulnerabilities
CVE-2026-8053: FlatBSON Duplicate Field Index Drift
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-13 · updated 2026-10-26
- Weakness: CWE-787
Description
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.
Affected products
- MongoDB: from 5.0.0 before 5.0.33; from 6.0.0 before 6.0.28; from 7.0.0 before 7.0.34; from 8.0.0 before 8.0.23; from 8.2.0 before 8.2.9; from 8.3.0 before 8.3.2 — fixed in 5.0.33, 6.0.28, 7.0.34, 8.0.23, 8.2.9, 8.3.2
How to fix
Upgrade to a fixed version: MongoDB 5.0.33, 6.0.28, 7.0.34, 8.0.23. Check the vendor advisory for mitigations.
References
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