UBUNTU-CVE-2026-78355

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Source
https://ubuntu.com/security/CVE-2026-78355
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-78355
Upstream
  • CVE-2026-78355
Published
2026-10-13T00:00:00Z
Modified
2026-10-14T03:23:31Z
Severity
  • 8.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A path traversal vulnerability in the OTRS SendSupportBundle functionality allows an authenticated administrator to reference file paths outside the intended directory. This may allow files accessible to the OTRS application process to be deleted. The vulnerability does not bypass operating system file permissions. On OTRS versions prior to OTRS 7, the effective permissions of the web server process are relevant. Starting with OTRS 7, access is limited by the permissions of the dedicated OTRS user. Files with overly permissive ownership or file system permissions may therefore also be affected. The affected functionality may additionally attempt to include controlled files in a support bundle. However, support bundles are sent to a predefined OTRS support address, and direct disclosure of arbitrary files to the attacker has not been demonstrated. An attacker therefore requires valid administrative access to exploit the vulnerable functionality. The primary demonstrated impact is the deletion of files outside the intended directory within the effective permissions of the OTRS application process. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.7.X Please note that ((OTRS)) Community Edition 6.x and before are vulnerable. Products based on the ((OTRS)) Community Edition also very likely to be affected

References

Affected packages

Ubuntu:16.04:LTS
otrs2

Package

Name
otrs2
Purl
pkg:deb/ubuntu/otrs2?arch=source&distro=xenial

Affected ranges

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

Affected versions

4.*
4.0.10-1
5.*
5.0.1-1
5.0.1-2
5.0.2-1
5.0.3-1
5.0.5-1
5.0.6-1
5.0.7-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs",
            "binary_version":  "5.0.7-1"
        },
        {
            "binary_name":  "otrs2",
            "binary_version":  "5.0.7-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
Ubuntu:18.04:LTS
otrs2

Package

Name
otrs2
Purl
pkg:deb/ubuntu/otrs2?arch=source&distro=bionic

Affected ranges

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

Affected versions

5.*
5.0.23-1
5.0.24-1
6.*
6.0.1-1
6.0.2-1
6.0.3-1
6.0.4-1
6.0.5-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs",
            "binary_version":  "6.0.5-1"
        },
        {
            "binary_name":  "otrs2",
            "binary_version":  "6.0.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
Ubuntu:20.04:LTS
otrs2

Package

Name
otrs2
Purl
pkg:deb/ubuntu/otrs2?arch=source&distro=focal

Affected ranges

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

Affected versions

6.*
6.0.20-1
6.0.23-2
6.0.24-1
6.0.25-1
6.0.25-2
6.0.25-3
6.0.26-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs",
            "binary_version":  "6.0.26-1"
        },
        {
            "binary_name":  "otrs2",
            "binary_version":  "6.0.26-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
Ubuntu:22.04:LTS
otrs2

Package

Name
otrs2
Purl
pkg:deb/ubuntu/otrs2?arch=source&distro=jammy

Affected ranges

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

Affected versions

6.*
6.0.32-6
6.1.2-1
6.2.1-1
6.2.2-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs2",
            "binary_version":  "6.2.2-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
Ubuntu:24.04:LTS
znuny

Package

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

Affected ranges

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

Affected versions

6.*
6.5.3-1
6.5.4-1
6.5.5-1
6.5.6-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs2",
            "binary_version":  "6.5.6-1"
        },
        {
            "binary_name":  "znuny",
            "binary_version":  "6.5.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
Ubuntu:26.04:LTS
znuny

Package

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

Affected ranges

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

Affected versions

6.*
6.5.15-2
6.5.18-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "otrs2",
            "binary_version":  "6.5.18-1"
        },
        {
            "binary_name":  "znuny",
            "binary_version":  "6.5.18-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"