CVE catalog

CVE-2026-18697

UBUNTU-

[CVE catalog]

An issue in MongoDB Server's aggregation framework could allow an unauthenticated party to cause a mongos (router) process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service, disrupting client connections routed through the affected mongos instance.

Severity
High · CVSS 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.44% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "mongodb",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1:2.4.6-0ubuntu5",
        "1:2.4.6-0ubuntu6",
        "1:2.4.8-1ubuntu1",
        "1:2.4.8-2",
        "1:2.4.9-1",
        "1:2.4.9-1ubuntu1",
        "1:2.4.9-1ubuntu2",
        "1:2.4.9-1ubuntu2+esm2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-18697"
    },
    {
      "name": "mongodb",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1:2.6.10-0ubuntu1",
        "1:2.6.10-0ubuntu1+esm2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-18697"
    },
    {
      "name": "mongodb",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1:3.4.7-1",
        "1:3.4.7-1ubuntu1",
        "1:3.4.7-1ubuntu2",
        "1:3.4.7-1ubuntu4",
        "1:3.4.14-3ubuntu1",
        "1:3.4.14-3ubuntu2",
        "1:3.6.3-0ubuntu1",
        "1:3.6.3-0ubuntu1.1",
        "1:3.6.3-0ubuntu1.3",
        "1:3.6.3-0ubuntu1.4",
        "1:3.6.3-0ubuntu1.4+esm1",
        "1:3.6.3-0ubuntu1.4+esm2"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-18697"
    },
    {
      "name": "mongodb",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu2",
        "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5",
        "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.2",
        "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3",
        "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"
      ],
      "ecosystem": "deb",
      "fixed_version": "",
      "provider_record_id": "UBUNTU-CVE-2026-18697"
    },
    {
      "name": "mongodb",
      "ranges": [],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-18697"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]