6.5Medium
Mongodb Mongodb
CVE-2026-18696
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.
What this means for your business
- It affects Mongodb. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an administrator login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 21% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Mongodb, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 6.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H- CVSS v4
- 7.0
- Weakness
- CWE-863
- Assigned by
- cna@mongodb.com
Dates
- Published
- 2026-08-11
- Last modified
- 2026-09-16
- Sources
- NVD
Affected products
- Mongodb Mongodb7.0.0 - 7.0.40, 8.0.0 - 8.0.29, 8.2.0 - 8.2.12, 8.3.0 - 8.3.8, 9.0.0, 9.1.0
As listed in the NVD configuration data. Not a statement about your estate.