CVE-2026-13078Network attack vector

File disclosure via unconditional MozJS module loader

Published Jul 22, 2026 · Updated Jul 22, 2026

File disclosure in MongoDB Server allows remote authenticated users to read host files via crafted aggregation pipelines. The server-side MozJS engine registers a module-loading hook without an authorization check, letting JavaScript load arbitrary filesystem paths under mongod's privileges. Database authentication and permission to submit a crafted aggregation pipeline are required, and disclosure is limited to files readable by the mongod process.

CVSS severity6.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

File disclosure in MongoDB Server allows remote authenticated users to read host files via crafted aggregation pipelines. The server-side MozJS engine registers a module-loading hook without an authorization check, letting JavaScript load arbitrary filesystem paths under mongod's privileges. Database authentication and permission to submit a crafted aggregation pipeline are required, and disclosure is limited to files readable by the mongod process.

The record

CVE
CVE-2026-13078
Published
Jul 22, 2026
Updated
Jul 22, 2026
Vendor
MongoDB
Product
MongoDB Server
Classifications
CWE-862, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.0 <7.0.39
  2. Affected versionversion=8.0 <8.0.28
  3. Affected versionversion=8.2.0 <8.2.12
  4. Affected versionversion=8.3.0 <8.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MongoDB · MongoDB Serverversion=7.0 <7.0.39; version=8.0 <8.0.28; version=8.2.0 <8.2.12; version=8.3.0 <8.3.7

Published CVSS scores

7.7MongoDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
6.3MongoDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/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-862Missing Authorization
T1005Data from Local System

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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