High severity · published Oct 12, 2026
CVE-2026-78355
Path Traversal in SendSupportBundle allows File Deletion Outside the Intended Directory
8.7
CVSS
0.7%
EPSS
No
On KEV
Description
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OC
((OTRS)) Community Edition · OTRS GmbH (former OTRS AG)
6.x · source: vendor
OT
OTRS · OTRS GmbH (former OTRS AG)
7.0.x; 8.0.x; 2023.x; 2024.x; 2025.x; 2026.x through 2026.6.x · source: vendor
Affected product
OC
((OTRS)) Community Edition
OTRS GmbH (former OTRS AG)
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78355
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78355
otrs.com
https://otrs.com/release-notes/otrs-security-advisory-2026-12/
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