UBUNTU-CVE-2026-93394

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Source

https://ubuntu.com/security/CVE-2026-93394

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93394.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93394

Upstream

CVE-2026-93394

Published

2026-09-17T21:17:00Z

Modified

2026-09-23T23:40:09Z

Severity

3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by injecting a crafted server-first-message containing a controlled salt and low iteration count, then capturing the resulting client proof to perform offline password cracking. This vulnerability is mitigated by TLS, which is standard in production deployments.

References

Affected packages

Ubuntu:Pro:20.04:LTS / mongo-c-driver

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.15.0-1

1.15.1-1

1.15.2-1

1.16.0-1

1.16.1-1

1.16.1-1build1

1.16.1-1build2

1.16.1-1ubuntu0.1~esm1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libbson-1.0-0",
            "binary_version":  "1.16.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libmongoc-1.0-0",
            "binary_version":  "1.16.1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93394.json"

Ubuntu:Pro:22.04:LTS / mongo-c-driver

Package

Name: mongo-c-driver
Purl: pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.18.0-1

1.19.1-1

1.19.2-1

1.20.0-1

1.20.0-1build1

1.20.1-1

1.21.0-1

1.21.0-1build1

1.21.0-1ubuntu0.1~esm1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libbson-1.0-0",
            "binary_version":  "1.21.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libmongoc-1.0-0",
            "binary_version":  "1.21.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93394.json"

Ubuntu:Pro:24.04:LTS / mongo-c-driver

Package

Name: mongo-c-driver
Purl: pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.24.3-1

1.24.4-1

1.25.1-1

1.25.2-1

1.25.4-1

1.26.0-1

1.26.0-1.1ubuntu1

1.26.0-1.1ubuntu2

1.26.0-1.1ubuntu2+esm1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libbson-1.0-0t64",
            "binary_version":  "1.26.0-1.1ubuntu2+esm1"
        },
        {
            "binary_name":  "libmongoc-1.0-0t64",
            "binary_version":  "1.26.0-1.1ubuntu2+esm1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93394.json"

Ubuntu:26.04:LTS / mongo-c-driver

Package

Name: mongo-c-driver
Purl: pkg:deb/ubuntu/mongo-c-driver?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.30.4-1ubuntu1

2.*

2.2.0-1

2.2.1-1

2.2.2-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libbson2-2",
            "binary_version":  "2.2.2-1"
        },
        {
            "binary_name":  "libmongoc2-2",
            "binary_version":  "2.2.2-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93394.json"