# CVE-2026-78355: Path Traversal in SendSupportBundle allows File Deletion Outside the Intended Directory

> An authenticated administrator can delete files outside the intended directory via path traversal in the SendSupportBundle feature.

- **Severity:** High 8.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-mjfj-wgf2-r3pg, UBUNTU-CVE-2026-78355

## What is CVE-2026-78355?

CVE-2026-78355 is a high-severity path traversal vulnerability in ((OTRS)) Community Edition, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official 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

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-78355?


## How do I fix CVE-2026-78355?

No fix has been published for CVE-2026-78355 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78355 being exploited?

There is no known exploitation of CVE-2026-78355 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78355 and fix it if it is affected.

What it is: CVE-2026-78355 is a high-severity path traversal vulnerability in ((OTRS)) Community Edition, published on 12 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-78355 in the wild and no public exploit code.

Affected product: ((OTRS)) Community Edition. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-78355/ (Markdown: https://insights.sbomify.com/CVE-2026-78355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78355
- OSV: https://osv.dev/vulnerability/CVE-2026-78355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78355/
Summaries are generated and may contain mistakes; the official description above is the record.