CVE-2026-18703CWE-863broken-access-control

CVE-2026-18703

Medium · published August 11, 2026

CVSS v3.1
4.2
EPSS
0%
Percentile
3.4
In the wild
Unconfirmed
What it is

An issue in MongoDB Server could allow a party with a valid client certificate and a corresponding user account to authenticate using a certificate-based authentication method, even when an administrator has configured the server to restrict authentication to other mechanisms. This could allow authentication through a method the administrator intended to disable.

The record
Technical detail
CVSS v3.1
4.2 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00144 · 3.4th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-08-11T23:17Z
Affected products (5)
ProductVersionsFixed in
mongodb/mongodb≥ 8.2.0, ≤ 8.2.12—
mongodb/mongodb≥ 8.3.0, < 8.3.88.3.8
mongodb/mongodball versions—
mongodb/mongodball versions—
mongodb/mongodball versions—
References (1)
https://jira.mongodb.org/browse/SERVER-127863 · [email protected]
EPSS history
Timeline
  • 11 AUG 18:33Z
    Improper Enforcement of Authentication Mechanism Restrictions in MongoDB Server Allows Use of Disabled Authentication Method
    cvelistv5