UBUNTU-CVE-2026-9749

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Source
https://ubuntu.com/security/CVE-2026-9749
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9749.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-9749
Upstream
  • CVE-2026-9749
Published
2026-06-09T23:17:00Z
Modified
2026-06-12T09:03:45.630500333Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer), the server reaches the code path where a full per-consumer buffer is detected but the internal "high watermark" for that key range is not updated as intended.

References

Affected packages

Ubuntu:Pro:14.04:LTS / mongodb

Package

Name
mongodb
Purl
pkg:deb/ubuntu/mongodb?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:2.*
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 specific 

{
    "binaries": [
        {
            "binary_version": "1:2.4.9-1ubuntu2+esm2",
            "binary_name": "mongodb"
        },
        {
            "binary_version": "1:2.4.9-1ubuntu2+esm2",
            "binary_name": "mongodb-clients"
        },
        {
            "binary_version": "1:2.4.9-1ubuntu2+esm2",
            "binary_name": "mongodb-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9749.json"

Ubuntu:Pro:16.04:LTS / mongodb

Package

Name
mongodb
Purl
pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:2.*
1:2.6.10-0ubuntu1
1:2.6.10-0ubuntu1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:2.6.10-0ubuntu1+esm2",
            "binary_name": "mongodb"
        },
        {
            "binary_version": "1:2.6.10-0ubuntu1+esm2",
            "binary_name": "mongodb-clients"
        },
        {
            "binary_version": "1:2.6.10-0ubuntu1+esm2",
            "binary_name": "mongodb-server"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9749.json"

Ubuntu:Pro:18.04:LTS / mongodb

Package

Name
mongodb
Purl
pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:3.*
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 specific 

{
    "binaries": [
        {
            "binary_version": "1:3.6.3-0ubuntu1.4+esm2",
            "binary_name": "mongodb"
        },
        {
            "binary_version": "1:3.6.3-0ubuntu1.4+esm2",
            "binary_name": "mongodb-clients"
        },
        {
            "binary_version": "1:3.6.3-0ubuntu1.4+esm2",
            "binary_name": "mongodb-server"
        },
        {
            "binary_version": "1:3.6.3-0ubuntu1.4+esm2",
            "binary_name": "mongodb-server-core"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9749.json"

Ubuntu:Pro:20.04:LTS / mongodb

Package

Name
mongodb
Purl
pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1:3.*
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 specific 

{
    "binaries": [
        {
            "binary_version": "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1",
            "binary_name": "mongodb"
        },
        {
            "binary_version": "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1",
            "binary_name": "mongodb-clients"
        },
        {
            "binary_version": "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1",
            "binary_name": "mongodb-server"
        },
        {
            "binary_version": "1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1",
            "binary_name": "mongodb-server-core"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-9749.json"