USN-8234-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-8234-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8234-1
Upstream
Related
Published
2026-05-05T18:27:40Z
Modified
2026-05-20T16:06:19.577621463Z
Summary
python-mako vulnerability
Details

It was discovered that Mako incorrectly handled URIs with double-slash prefixes in TemplateLookup. A remote attacker could possibly use this issue to obtain sensitive information.

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
Fixed
1.1.3+ds1-2ubuntu0.2

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.1.3+ds1-2ubuntu0.2",
            "binary_name": "python3-mako"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-41205"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.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
Fixed
1.3.2-1ubuntu0.1

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.2-1ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-41205",
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.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
Fixed
1.3.9-1ubuntu0.1

Affected versions

1.*
1.3.8-2
1.3.9-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.9-1ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "id": "CVE-2026-41205",
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.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
Fixed
1.3.10-3ubuntu0.1

Affected versions

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

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-3ubuntu0.1",
            "binary_name": "python3-mako"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-41205"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.json"
Ubuntu:Pro:16.04:LTS
mako

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.0.3+ds1-1ubuntu1+esm2

Affected versions

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

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"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:16.04:LTS",
    "cves": []
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.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
Fixed
1.0.7+ds1-1ubuntu0.2+esm1

Affected versions

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

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"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:18.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-41205",
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.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
Fixed
1.1.0+ds1-1ubuntu2.1+esm1

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

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"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

cves_map 
{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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/E:P",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-41205"
        }
    ]
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8234-1.json"