CVE-2026-18687CWE-191

CVE-2026-18687

High · published August 11, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
13.6
In the wild
Unconfirmed
What it is

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00234 · 13.6th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-08-11T23:17Z
Affected products (6)
ProductVersionsFixed in
mongodb/mongodb≥ 8.0.0, < 8.0.298.0.29
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-130628 · [email protected]
EPSS history
Timeline
  • 11 AUG 18:35Z
    Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial of Service and Index Corruption
    cvelistv5