CVE-2026-8053

FlatBSON Duplicate Field Index Drift

HIGH

8.8

CVSS Score

Published: May 12, 2026 at 11:59 PM UTC

Updated: October 26, 2026 at 06:10 PM UTC

1 product affected across 1 vendorMongoDB

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Severity

HIGH8.8

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MongoDB · MongoDB

95%

5.0.0 ≤ v < 5.0.336.0.0 ≤ v < 6.0.287.0.0 ≤ v < 7.0.348.0.0 ≤ v < 8.0.238.2.0 ≤ v < 8.2.98.3.0 ≤ v < 8.3.25.0 6.0 7.0 8.0 8.2 8.3

Affected range stops below 5.0.33, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.0.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.34, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.0.23, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.3.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://jira.mongodb.org/browse/SERVER-126021

References (1)

Issue TrackingPatchVendor Advisory

Source: cverecord

https://jira.mongodb.org/browse/SERVER-126021

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHmongodb

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-787

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