UBUNTU-CVE-2026-93853

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Source
https://ubuntu.com/security/CVE-2026-93853
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93853
Upstream
  • CVE-2026-93853
Published
2026-09-29T21:19:00Z
Modified
2026-10-01T00:22:42Z
Severity
  • 7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Unverified ownership in Barman snapshot backup deletion allows a principal who can write the backup catalog to cause Barman to delete unrelated cloud snapshots. When a snapshot backup is deleted, either explicitly or by retention policy enforcement, Barman reads the snapshot identifiers from the backup.info file and passes them to the cloud provider's delete API using Barman's own credentials, without verifying that the snapshots belong to that backup. An attacker who can overwrite backup.info but lacks snapshot delete permissions can substitute the identifiers of other snapshots, causing Barman to delete any snapshot its cloud identity can reach on AWS, Microsoft Azure, or Google Cloud. Exploitation requires a deployment where the principal that writes the backup catalog is separate from the identity Barman uses to delete snapshots. Barman versions from 3.4.0 (Google Cloud), 3.6.0 (Azure), and 3.7.0 (AWS) up to and including 3.20.0 are affected. The issue is fixed in Barman 3.20.1.

References

Affected packages

Ubuntu:16.04:LTS
barman

Package

Name
barman
Purl
pkg:deb/ubuntu/barman?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.4.1-1
1.5.0-1
1.5.1-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "1.5.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"
Ubuntu:18.04:LTS
barman

Package

Name
barman
Purl
pkg:deb/ubuntu/barman?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.2-1
2.3-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "2.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"
Ubuntu:20.04:LTS
barman

Package

Name
barman
Purl
pkg:deb/ubuntu/barman?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.9-1
2.9-2
2.10-1
2.10-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "2.10-2"
        },
        {
            "binary_name":  "barman-cli",
            "binary_version":  "2.10-2"
        },
        {
            "binary_name":  "python3-barman",
            "binary_version":  "2.10-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"
Ubuntu:22.04:LTS
barman

Package

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

Affected ranges

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

Affected versions

2.*
2.13-1
2.15-1
2.16-1
2.17-1
2.18-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "2.18-1"
        },
        {
            "binary_name":  "barman-cli",
            "binary_version":  "2.18-1"
        },
        {
            "binary_name":  "barman-cli-cloud",
            "binary_version":  "2.18-1"
        },
        {
            "binary_name":  "python3-barman",
            "binary_version":  "2.18-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"
Ubuntu:24.04:LTS
barman

Package

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

Affected ranges

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

Affected versions

3.*
3.6.0-1
3.9.0-1
3.10.0-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "3.10.0-1"
        },
        {
            "binary_name":  "barman-cli",
            "binary_version":  "3.10.0-1"
        },
        {
            "binary_name":  "barman-cli-cloud",
            "binary_version":  "3.10.0-1"
        },
        {
            "binary_name":  "python3-barman",
            "binary_version":  "3.10.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"
Ubuntu:26.04:LTS
barman

Package

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

Affected ranges

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

Affected versions

3.*
3.14.1-1
3.16.0-1
3.17.0-1
3.18.0-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "barman",
            "binary_version":  "3.18.0-1"
        },
        {
            "binary_name":  "barman-cli",
            "binary_version":  "3.18.0-1"
        },
        {
            "binary_name":  "barman-cli-cloud",
            "binary_version":  "3.18.0-1"
        },
        {
            "binary_name":  "python3-barman",
            "binary_version":  "3.18.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93853.json"