# CVE-2026-85688: TEN Framework 0.11.71 Unauthenticated File Read/Write via TMAN Designer

> Unauthenticated attackers can read or write arbitrary files via TMAN Designer API, leading to code execution through system file manipulation.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-32p3-43gv-3r2m

## What is CVE-2026-85688?

CVE-2026-85688 is a critical path traversal vulnerability in ten-framework, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TEN Framework 0.11.71 contains unauthenticated arbitrary file read and write vulnerabilities in the TMAN Designer file-content API endpoints. Attackers can submit POST and PUT requests to the /api/designer/v1/file-content endpoints to read arbitrary files or write malicious content to system paths, enabling code execution through authorized_keys, cron files, or executable graph files.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-85688?


## How do I fix CVE-2026-85688?

No fix has been published for CVE-2026-85688 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85688 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85688 exists.

Public exploit code:

- TEN Framework - Arbitrary File Read & Write (nuclei): http/cves/2026/CVE-2026-85688.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85688 and fix it if it is affected.

What it is: CVE-2026-85688 is a critical path traversal vulnerability in ten-framework, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85688 exists.

Affected product: ten-framework. 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-2026-85688/ (Markdown: https://insights.sbomify.com/CVE-2026-85688/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85688
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85688
- OSV: https://osv.dev/vulnerability/CVE-2026-85688

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85688/
Summaries are generated and may contain mistakes; the official description above is the record.