CVE-2026-8053Network attack vector

Authenticated code execution via bucket-index drift

Published May 12, 2026 · Updated May 13, 2026

Out-of-bounds write in MongoDB Server's affected 5.0 through 8.3 branches allows remote authenticated users to execute arbitrary code. Processing duplicate FlatBSON field names desynchronizes the time-series bucket catalog's field-name-to-index mapping, causing mongod to write beyond a memory boundary. Database write privileges and crafted time-series operations are required; successful exploitation runs code in the mongod process and can compromise stored data and service availability.

CVSS severity8.7
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in MongoDB Server's affected 5.0 through 8.3 branches allows remote authenticated users to execute arbitrary code. Processing duplicate FlatBSON field names desynchronizes the time-series bucket catalog's field-name-to-index mapping, causing mongod to write beyond a memory boundary. Database write privileges and crafted time-series operations are required; successful exploitation runs code in the mongod process and can compromise stored data and service availability.

The record

CVE
CVE-2026-8053
Published
May 12, 2026
Updated
May 13, 2026
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0 <5.0.33
  2. Affected versionversion=6.0 <6.0.28
  3. Affected versionversion=7.0 <7.0.34
  4. Affected versionversion=8.0 <8.0.23
  5. Affected versionversion=8.2 <8.2.9
  6. Affected versionversion=8.3 <8.3.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoDB Serverversion=5.0 <5.0.33; version=6.0 <6.0.28; version=7.0 <7.0.34; version=8.0 <8.0.23; version=8.2 <8.2.9; version=8.3 <8.3.2

Published CVSS scores

8.8MongoDB, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7MongoDB, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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