# CVE-2026-11429: Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code Execution

> Unauthenticated attackers can exploit path traversal in Altium Vault ScriptsController to upload arbitrary files and achieve remote code execution.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Jun 2026
- **Updated:** 9 Jun 2026
- **Also known as:** GHSA-f7c8-3j67-9q8x

## What is CVE-2026-11429?

CVE-2026-11429 is a critical path traversal vulnerability in Altium 365, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file uploads where a user-supplied filename component is used to construct the destination path without validation, allowing arbitrary files to be written to any location writable by the service account. Because the file write operation completes before authentication is validated, the vulnerability can be exploited without any credentials, session, or prior knowledge of the system.

An unauthenticated network attacker can use this primitive to place executable content in directories where it is later executed by the service, resulting in remote code execution under the Vault Service account. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 (commercial and government cloud) at the service level.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-11429?


## How do I fix CVE-2026-11429?

No fix has been published for CVE-2026-11429 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11429 being exploited?

There is no known exploitation of CVE-2026-11429 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11429 and fix it if it is affected.

What it is: CVE-2026-11429 is a critical path traversal vulnerability in Altium 365, published on 5 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-11429 in the wild and no public exploit code.

Affected product: Altium 365. 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-2026-11429/ (Markdown: https://insights.sbomify.com/CVE-2026-11429/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11429
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11429
- OSV: https://osv.dev/vulnerability/CVE-2026-11429

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11429/
Summaries are generated and may contain mistakes; the official description above is the record.