# CVE-2026-27897: Vociferous Unauthenticated Remote Path Traversal (RCE via CSRF)

> Unauthenticated attackers can exploit path traversal in the export API to write arbitrary files, potentially achieving remote code execution.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Mar 2026
- **Updated:** 11 Mar 2026

## What is CVE-2026-27897?

CVE-2026-27897 is a critical path traversal vulnerability in WanderingAstronomer Vociferous, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Vociferous provides cross-platform, offline speech-to-text with local AI refinement. Prior to 4.4.2, the vulnerability exists in src/api/system.py within the export_file route. The application accepts a JSON payload containing a filename and content. While the developer intended for a native UI dialog to handle the file path, the API does not validate the filename string before it is processed by the backends filesystem logic. Because the API is unauthenticated and the CORS configuration in app.py is overly permissive (allow_origins=["*"] or allowing localhost), an external attacker can bypass the UI entirely. By using directory traversal sequences (../), an attacker can force the app to write arbitrary data to any location accessible by the current user's permissions. This vulnerability is fixed in 4.4.2.

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-2026-27897?

It affects 1 product.


Products: Wanderingastronomer Vociferous.

## How do I fix CVE-2026-27897?

No fix has been published for CVE-2026-27897 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-27897 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27897 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-27897 and fix it if it is affected.

What it is: CVE-2026-27897 is a critical path traversal vulnerability in WanderingAstronomer Vociferous, published on 11 Mar 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-2026-27897 exists.

Affected product: WanderingAstronomer Vociferous. 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-2026-27897/ (Markdown: https://insights.sbomify.com/CVE-2026-27897/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27897
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27897
- OSV: https://osv.dev/vulnerability/CVE-2026-27897

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-27897/
Summaries are generated and may contain mistakes; the official description above is the record.