# CVE-2026-110657: Khronos NNEF-Tools nnef through 1.0.10 and nnef-tools through 1.0.11 Path Traversal via Variable Label

> Attackers can write files outside the model directory via crafted variable labels in NNEF files, potentially overwriting critical data.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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:** 14 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-3m64-wpw6-whjx

## What is CVE-2026-110657?

CVE-2026-110657 is a medium-severity path traversal vulnerability in Khronos Group nnef, published on 14 Oct 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

Khronos NNEF-Tools nnef through 1.0.10 and nnef-tools through 1.0.11 contain a path traversal vulnerability that allows attackers to write files outside the model directory via crafted variable labels. Attackers can supply a graph.nnef with '../' sequences or absolute paths in labels to create or overwrite '.dat' files when users convert, save, or generate weights.

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

## Which versions are affected by CVE-2026-110657?


## How do I fix CVE-2026-110657?

No fix has been published for CVE-2026-110657 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-110657 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110657 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-110657 and fix it if it is affected.

What it is: CVE-2026-110657 is a medium-severity path traversal vulnerability in Khronos Group nnef, published on 14 Oct 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110657 exists.

Affected product: Khronos Group nnef. 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-2026-110657/ (Markdown: https://insights.sbomify.com/CVE-2026-110657/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-110657
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-110657
- OSV: https://osv.dev/vulnerability/CVE-2026-110657

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-110657/
Summaries are generated and may contain mistakes; the official description above is the record.