# CVE-2026-34664: Substance3D - Designer | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22)

> An attacker can read sensitive files outside the intended directory by tricking a user into opening a malicious file in Adobe Substance 3D Designer.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 May 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-r2h3-cfxv-h42g

## What is CVE-2026-34664?

CVE-2026-34664 is a medium-severity path traversal vulnerability in Adobe Substance 3d Designer, published on 12 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Substance3D - Designer versions 15.1.0 and earlier are affected by an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could lead to arbitrary file system read. An attacker could exploit this vulnerability to access sensitive files and directories outside the intended access scope. Exploitation of this issue requires user interaction in that a victim must open a malicious file. Scope is changed.

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

## Which versions are affected by CVE-2026-34664?

It affects 1 product.


Products: Adobe Substance 3d Designer.

## How do I fix CVE-2026-34664?

No fix has been published for CVE-2026-34664 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34664 being exploited?

There is no known exploitation of CVE-2026-34664 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Substance 3d Designer

- [CVE-2026-103821](https://insights.sbomify.com/CVE-2026-103821/): Substance3D - Designer | Out-of-bounds Write (CWE-787) (high 7.8)
- [CVE-2026-48426](https://insights.sbomify.com/CVE-2026-48426/): Substance3D - Designer | Out-of-bounds Write (CWE-787) (high 7.8)
- [CVE-2026-48427](https://insights.sbomify.com/CVE-2026-48427/): Substance3D - Designer | Out-of-bounds Write (CWE-787) (high 7.8)
- [CVE-2026-48428](https://insights.sbomify.com/CVE-2026-48428/): Substance3D - Designer | Heap-based Buffer Overflow (CWE-122) (high 7.8)
- [CVE-2026-48430](https://insights.sbomify.com/CVE-2026-48430/): Substance3D - Designer | Heap-based Buffer Overflow (CWE-122) (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34664 and fix it if it is affected.

What it is: CVE-2026-34664 is a medium-severity path traversal vulnerability in Adobe Substance 3d Designer, published on 12 May 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-34664 in the wild and no public exploit code.

Affected product: Adobe Substance 3d Designer. 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-2026-34664/ (Markdown: https://insights.sbomify.com/CVE-2026-34664/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34664
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34664
- OSV: https://osv.dev/vulnerability/CVE-2026-34664

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34664/
Summaries are generated and may contain mistakes; the official description above is the record.