otrs2, znuny — security advisory
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
- Products
- otrs2, znuny
- Affected versions
- 4.0.10-1, 5.0.1-1, 5.0.1-2, 5.0.2-1, 5.0.23-1, 5.0.24-1, 5.0.3-1, 5.0.5-1, 5.0.6-1, 5.0.7-1, 6.0.1-1, 6.0.2-1, 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, 6.0.3-1, 6.0.32-6, 6.0.4-1, 6.0.5-1, 6.1.2-1, 6.2.1-1, 6.2.2-2, 6.5.15-2, 6.5.18-1, 6.5.20-1, 6.5.21-1, 6.5.22-1, 6.5.23-1, 6.5.3-1, 6.5.4-1, 6.5.5-1, 6.5.6-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-78355
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:19 UTC · Revision 1
Source evidence
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
osv:UBUNTU-CVE-2026-78355
otrs2
Fixed versions: Not specified
otrs2
Fixed versions: Not specified
otrs2
Fixed versions: Not specified
otrs2
Fixed versions: Not specified
znuny
Fixed versions: Not specified
znuny
Fixed versions: Not specified
znuny
Fixed versions: Not specified
Complete source record
{
"id": "38e4399264e57b8caf2648d5ee9d26b0bbaf3be48a5f7978962ade77e60f43fb",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-78355",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-78355",
"summary": "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",
"evidence": "osv:UBUNTU-CVE-2026-78355",
"products": [
{
"name": {
"value": "otrs2",
"evidence": "/affected/0/package/name"
},
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"affected_versions": [
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.5.3-1",
"evidence": "/affected/4/versions"
},
{
"value": "6.5.4-1",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
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{
"name": {
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"evidence": "/affected/5/package/name"
},
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"affected_versions": [
{
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"evidence": "/affected/5/versions"
},
{
"value": "6.5.20-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.5.21-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.5.22-1",
"evidence": "/affected/5/versions"
},
{
"value": "6.5.23-1",
"evidence": "/affected/5/versions"
}
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},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/6/versions"
},
{
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"evidence": "/affected/6/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-78355",
"aliases": [
"UBUNTU-CVE-2026-78355"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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"events": [
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"introduced": "0"
}
]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/otrs2?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
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"5.0.1-1",
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"5.0.5-1",
"5.0.6-1",
"5.0.7-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-78355.json"
},
"ecosystem_specific": {
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},
{
"binary_name": "otrs2",
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}
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}
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}
],
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"ecosystem": "Ubuntu:18.04:LTS"
},
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"5.0.24-1",
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"6.0.2-1",
"6.0.3-1",
"6.0.4-1",
"6.0.5-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
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"6.0.23-2",
"6.0.24-1",
"6.0.25-1",
"6.0.25-2",
"6.0.25-3",
"6.0.26-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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},
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},
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],
"modified": "2026-10-17T13:01:08.867603940Z",
"provider": "osv",
"upstream": [
"CVE-2026-78355"
],
"references": [
"https://ubuntu.com/security/CVE-2026-78355",
"https://www.cve.org/CVERecord?id=CVE-2026-78355",
"https://otrs.com/release-notes/otrs-security-advisory-2026-12/"
]
},
"related_cves": [
{
"value": "CVE-2026-78355",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 361070,
"published_at": "2026-10-12T07:16:00+00:00"
}