USN-8856-1

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Source
https://ubuntu.com/security/notices/USN-8856-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8856-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8856-1
Upstream
Related
Published
2026-09-30T15:59:30Z
Modified
2026-10-01T00:27:48Z
Summary
kdenlive, mlt vulnerability
Details

It was discovered that Kdenlive allowed dangerous proxy parameters when processing attacker-controlled project files. An attacker could use this to execute arbitrary commands via the MLT framework's ante/post consumer properties.

References

Affected packages

Ubuntu:26.04:LTS / kdenlive

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4:25.12.3-0ubuntu1.1

Affected versions

4:25.*
4:25.08.1-0ubuntu1
4:25.08.2-0ubuntu1
4:25.08.3-0ubuntu1
4:25.11.80-0ubuntu1
4:25.11.90-0ubuntu1
4:25.12.0-0ubuntu1
4:25.12.0-0ubuntu2
4:25.12.1-0ubuntu1
4:25.12.1-0ubuntu2
4:25.12.2-0ubuntu1
4:25.12.3-0ubuntu1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "kdenlive",
            "binary_version":  "4:25.12.3-0ubuntu1.1"
        },
        {
            "binary_name":  "kdenlive-data",
            "binary_version":  "4:25.12.3-0ubuntu1.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-45184",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8856-1.json"

Ubuntu:26.04:LTS / mlt

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.36.1-1ubuntu3.1

Affected versions

7.*
7.32.0-1
7.34.0-1
7.34.1+realtar-0ubuntu1
7.34.1+realtar-0ubuntu2
7.36.1-1ubuntu1
7.36.1-1ubuntu2
7.36.1-1ubuntu3

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libmlt++7",
            "binary_version":  "7.36.1-1ubuntu3.1"
        },
        {
            "binary_name":  "libmlt-data",
            "binary_version":  "7.36.1-1ubuntu3.1"
        },
        {
            "binary_name":  "libmlt7",
            "binary_version":  "7.36.1-1ubuntu3.1"
        },
        {
            "binary_name":  "melt",
            "binary_version":  "7.36.1-1ubuntu3.1"
        },
        {
            "binary_name":  "python3-mlt",
            "binary_version":  "7.36.1-1ubuntu3.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-45184",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8856-1.json"