UBUNTU-CVE-2026-44307

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Source
https://ubuntu.com/security/CVE-2026-44307
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44307
Upstream
  • CVE-2026-44307
Published
2026-05-12T22:16:00Z
Modified
2026-05-20T21:47:59Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal (e.g. ....\ secret.txt) bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.get_template(), allowing reads of files outside the configured template directory. This vulnerability is fixed in 1.3.12.

References

Affected packages

Ubuntu:22.04:LTS
mako

Package

Name
mako
Purl
pkg:deb/ubuntu/mako?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.1.3+ds1-2
1.1.3+ds1-2ubuntu0.1
1.1.3+ds1-2ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.3+ds1-2ubuntu0.2",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:24.04:LTS
mako

Package

Name
mako
Purl
pkg:deb/ubuntu/mako?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.2.4+ds-2
1.3.1-1
1.3.2-1
1.3.2-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.2-1ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:25.10
mako

Package

Name
mako
Purl
pkg:deb/ubuntu/mako?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.3.8-2
1.3.9-1
1.3.9-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.9-1ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:26.04:LTS
mako

Package

Name
mako
Purl
pkg:deb/ubuntu/mako?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.3.9-1
1.3.10-3
1.3.10-3build1
1.3.10-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-3ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:Pro:16.04:LTS
mako

Package

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

Affected ranges

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

Affected versions

1.*
1.0.2+ds1-1
1.0.3+ds1-1
1.0.3+ds1-1ubuntu1
1.0.3+ds1-1ubuntu1+esm1
1.0.3+ds1-1ubuntu1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.3+ds1-1ubuntu1+esm2",
            "binary_name": "python-mako"
        },
        {
            "binary_version": "1.0.3+ds1-1ubuntu1+esm2",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:Pro:18.04:LTS
mako

Package

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

Affected ranges

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

Affected versions

1.*
1.0.7+ds1-1
1.0.7+ds1-1ubuntu0.2
1.0.7+ds1-1ubuntu0.2+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.0.7+ds1-1ubuntu0.2+esm1",
            "binary_name": "python-mako"
        },
        {
            "binary_version": "1.0.7+ds1-1ubuntu0.2+esm1",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"
Ubuntu:Pro:20.04:LTS
mako

Package

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

Affected ranges

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

Affected versions

1.*
1.0.7+ds1-1
1.1.0+ds1-1
1.1.0+ds1-1ubuntu1
1.1.0+ds1-1ubuntu2
1.1.0+ds1-1ubuntu2.1
1.1.0+ds1-1ubuntu2.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.0+ds1-1ubuntu2.1+esm1",
            "binary_name": "python-mako"
        },
        {
            "binary_version": "1.1.0+ds1-1ubuntu2.1+esm1",
            "binary_name": "python3-mako"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44307.json"