Description
An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections they do not have permission to manipulate. This is due to an inconsistency in how the target collection is determined between the authorization check and the actual operation.
Published: 2026-08-11
Score: 7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability stems from an inconsistency between the collection identified during authorization checks and the collection actually affected by the applyOps command. This discrepancy allows an authenticated user who holds certain non‑default privileges to execute data‑definition operations—such as dropping or altering collections—that they are not explicitly authorized to perform. The effect is that an attacker can modify or delete data structures, undermining the integrity of the database.

Affected Systems

MongoDB Server is affected. No specific product versions are listed in the advisory, so all current releases that have not yet been patched remain vulnerable.

Risk and Exploitability

The CVSS score of 7 indicates a medium severity vulnerability. The EPSS score of less than 1 % suggests that exploitation is relatively unlikely, and the issue is not currently listed in CISA’s KEV catalog. The likely attack vector is an authenticated user with inadequate privileges; based on the description, it is inferred that the attacker must be able to submit applyOps commands through a client or application that has valid credentials for the database.

Generated by OpenCVE AI on August 12, 2026 at 19:45 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade to a MongoDB Server release that contains the fix for the applyOps authorization issue
  • Restrict user roles to the minimum privileges required, ensuring no unnecessary DDL permissions are granted
  • Configure and monitor database audit logs to detect unauthorized applyOps activities

Generated by OpenCVE AI on August 12, 2026 at 19:45 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 12 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb mongodb Server
Vendors & Products Mongodb
Mongodb mongodb Server

Tue, 11 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 11 Aug 2026 19:00:00 +0000

Type Values Removed Values Added
Description An issue in MongoDB Server's applyOps command could allow an authenticated user with specific non-default privileges to perform certain data-definition operations, such as dropping or modifying collections, against collections they do not have permission to manipulate. This is due to an inconsistency in how the target collection is determined between the authorization check and the actual operation.
Title Improper Authorization in MongoDB applyOps Command Handling Allows Unauthorized DDL Operations on Collections
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H'}

cvssV4_0

{'score': 7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Mongodb Mongodb Server
cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-08-11T20:23:36.869Z

Reserved: 2026-08-03T15:53:32.505Z

Link: CVE-2026-18696

cve-icon Vulnrichment

Updated: 2026-08-11T20:23:32.586Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-11T19:17:23.853

Modified: 2026-08-28T21:16:15.740

Link: CVE-2026-18696

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T20:00:04Z

Weaknesses