CyberSecBulletin
CVE-2026-13072NVD status: Analyzed

MongoDB Server: Heap-based Buffer Overflow

Published Updated By the CyberSecBulletin desk

CVE-2026-13072 is a high-severity heap-based buffer overflow vulnerability in MongoDB Server from MongoDB, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 7.0.39, 8.0.28, 8.2.12 as the first without the flaw, so updating MongoDB Server to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.4% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update MongoDB Server to 7.0.39 or 8.0.28 or 8.2.12 or 8.3.7, whichever matches your release line, or a later version.
  2. Update Mongodb to 7.0.39 or 8.0.28 or 8.2.12 or 8.3.7, whichever matches your release line, or a later version.
  3. Read the advisory on jira.mongodb.org for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
MongoDBMongoDB Server7.0 up to, but not including, 7.0.39; 8.0 up to, but not including, 8.0.28; 8.2.0 up to, but not including, 8.2.12; 8.3.0 up to, but not including, 8.3.77.0.39, 8.0.28, 8.2.12, 8.3.7
MongoDBMongodb7.0.0 up to, but not including, 7.0.39; 8.0.0 up to, but not including, 8.0.28; 8.2.0 up to, but not including, 8.2.12; 8.3.0 up to, but not including, 8.3.77.0.39, 8.0.28, 8.2.12, 8.3.7

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (mongodb.com).

Scoring systemScoreSeverityScored by
CVSS 4.09.2CriticalCNA (mongodb.com)
CVSS 3.18.1HighCNA (mongodb.com)

Official description

When compute mode is enabled on a standalone mongod instance, insufficient validation of externally sourced BSON data during aggregation pipeline processing can result in memory corruption, potentially leading to process termination or other unintended behavior. This configuration is non-default and requires explicit enablement at startup.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Heap-based Buffer Overflow

The product writes past the end of a buffer that was allocated on the heap.

How developers prevent this class of flaw

  • Pre-design: Use a language or compiler that performs automatic bounds checking.
  • Use an abstraction library to abstract away risky APIs. Not a complete solution.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Heap-based Buffer Overflow vulnerabilities (CWE-122)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in MongoDB Server

All MongoDB Server vulnerabilities

Recent Heap-based Buffer Overflow vulnerabilities

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