# CVE-2026-110385: Path traversal in Document Server

> Authenticated attackers can execute arbitrary OS commands by exploiting path traversal in the Document Builder API to overwrite configuration files.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-4j4f-mq3p-mc2r

## What is CVE-2026-110385?

CVE-2026-110385 is a high-severity path traversal vulnerability in ONLYOFFICE Document Server, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A remote code execution vulnerability in ONLYOFFICE Document Server versions before10.0.0 allows an authenticated attacker with a valid Inbox-compatible JWT to execute arbitrary operating system commands as the ds service account. The Document Builder API improperly processes user-controlled converter XML supplied through the optional third argument of builder.SaveFile(). By injecting a duplicate m_sFileTo element, an attacker can override the server-generated output path and write arbitrary content outside the designated job directory. This allows the attacker to overwrite the runtime.json configuration file, modify the Document Builder executable path and arguments, and execute arbitrary commands when a subsequent Document Builder job is processed.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-110385?


## How do I fix CVE-2026-110385?

No fix has been published for CVE-2026-110385 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-110385 being exploited?

There is no known exploitation of CVE-2026-110385 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-110385 and fix it if it is affected.

What it is: CVE-2026-110385 is a high-severity path traversal vulnerability in ONLYOFFICE Document Server, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-110385 in the wild and no public exploit code.

Affected product: ONLYOFFICE Document Server. 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-2026-110385/ (Markdown: https://insights.sbomify.com/CVE-2026-110385/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-110385
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-110385
- OSV: https://osv.dev/vulnerability/CVE-2026-110385

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-110385/
Summaries are generated and may contain mistakes; the official description above is the record.