CVE-2026-18704CWE-862broken-access-control

CVE-2026-18704

Medium · published August 11, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
9.8
In the wild
Unconfirmed
What it is

An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00203 · 9.8th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-08-11T23:17Z
Affected products (1)
ProductVersionsFixed in
mongodb/mongodb≥ 8.3.0, < 8.3.88.3.8
References (1)
https://jira.mongodb.org/browse/SERVER-129936 · [email protected]
EPSS history
Timeline
  • 11 AUG 18:37Z
    Improper Authorization in MongoDB Aggregation Framework Allows Read-Only User to Perform Unauthorized Write Operations
    cvelistv5