FlatBSON Duplicate Field Index Drift
Published May 12, 2026
8.7
HIGHCVSS 4.0
EPSS 0.66%
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
-
- Version 5.0StatusaffectedConstraints<5.0.33
- Version 6.0StatusaffectedConstraints<6.0.28
- Version 7.0StatusaffectedConstraints<7.0.34
- Version 8.0StatusaffectedConstraints<8.0.23
- Version 8.2StatusaffectedConstraints<8.2.9
- Version 8.3StatusaffectedConstraints<8.3.2
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MongoDB, Inc. | MongoDB Server | unaffected |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (2)
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-29888 Advisory
- https://jira.mongodb.org/browse/SERVER-126021 issue-trackingPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-29888 | Advisory | |
| https://jira.mongodb.org/browse/SERVER-126021 | issue-trackingPatchVendor Advisory |
Change history (0)
No recorded changes yet.