UBUNTU-CVE-2026-127121

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Source
https://ubuntu.com/security/CVE-2026-127121
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-127121
Upstream
Published
2026-11-13T00:00:00Z
Modified
2026-11-13T21:05:35Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

SOGo before 5.12.13 contains an improper cryptographic signature verification vulnerability that allows remote attackers to replace a victim's contact S/MIME certificate by sending a spoofed multipart/signed message with a mismatched signature and an impersonated From address. Attackers can deliver a crafted CMS signedData object containing their own self-signed certificate, which SOGo's UIxMailView stores on the contact card without validating signature authenticity or certificate identity, enabling subsequent encrypted communications to be decrypted with the attacker's private key.

References

Affected packages

Ubuntu:26.10
sogo

Package

Name
sogo
Purl
pkg:deb/ubuntu/sogo?arch=source&distro=stonking

Affected ranges

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

Affected versions

5.*
5.12.4-1.2
5.12.8-2
5.12.9-1
5.12.10-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "5.12.10-1ubuntu1"
        },
        {
            "binary_name": "sogo-activesync",
            "binary_version": "5.12.10-1ubuntu1"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "5.12.10-1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"
Ubuntu:Pro:16.04:LTS
sogo

Package

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

Affected ranges

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

Affected versions

2.*
2.2.17a-1
2.2.17a-1.1
2.2.17a-1.1build1
2.2.17a-1.1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "2.2.17a-1.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "2.2.17a-1.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"
Ubuntu:Pro:18.04:LTS
sogo

Package

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

Affected ranges

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

Affected versions

3.*
3.2.10-1
3.2.10-1build1
3.2.10-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "3.2.10-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "3.2.10-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"
Ubuntu:Pro:20.04:LTS
sogo

Package

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

Affected ranges

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

Affected versions

4.*
4.0.8-1
4.1.0-1
4.1.1-1
4.3.0-1
4.3.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "4.3.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "4.3.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"
Ubuntu:Pro:22.04:LTS
sogo

Package

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

Affected ranges

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

Affected versions

5.*
5.1.0-1
5.2.0-1
5.2.0-3
5.3.0-1
5.3.0-1build2
5.4.0-1
5.5.0-1
5.5.1-1
5.5.1-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "5.5.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "sogo-activesync",
            "binary_version": "5.5.1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "5.5.1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"
Ubuntu:Pro:26.04:LTS
sogo

Package

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

Affected ranges

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

Affected versions

5.*
5.12.1-3
5.12.4-1
5.12.4-1.1
5.12.4-1.2
5.12.4-1.2ubuntu0.1~esm1
5.12.4-1.2ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sogo",
            "binary_version": "5.12.4-1.2ubuntu0.1~esm2"
        },
        {
            "binary_name": "sogo-activesync",
            "binary_version": "5.12.4-1.2ubuntu0.1~esm2"
        },
        {
            "binary_name": "sogo-common",
            "binary_version": "5.12.4-1.2ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-127121.json"