CVE-2026-108372 LoopX serve-status permissive CORS policy exposes control-plane state and private Markdown files
A permissive CORS policy in LoopX allows remote attackers to read control-plane state and private files via cross-origin requests from a victim's browser.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-108372?
CVE-2026-108372 is a high-severity vulnerability in huangruiteng loopx, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Open and provider-neutral, LoopX is a lightweight state kernel and local-first control plane for loop engineering. From version 0.0.1 until 0.4.5, `loopx serve-status` in `loopx/status_server.py` uses `StatusRequestHandler._send_json()` and `do_OPTIONS()` to send `Access-Control-Allow-Origin: *` for unauthenticated responses on predictable loopback ports. A remote attacker can cause an operator who visits attacker-controlled web content to issue cross-origin requests to `GET /status.json`, `GET /review-material?goal_id=...&path=...`, `GET /`, and `POST /control-plane/configure-goal/dry-run`, exposing control-plane state, goal and run information, local absolute paths, private Markdown files below registered goal roots, and dry-run configuration projections. The affected routes do not provide cross-origin writes or arbitrary-file access. This issue is fixed in version 0.4.5.
Which versions are affected by CVE-2026-108372?
2 open source packages ship an affected version, including loopx.
| Package | Affected | Fixed in |
|---|---|---|
loopx PyPI | From 0.0.1 | 0.4.5 |
loopx PyPI | From 0.0.1 | 0.4.5 |
How do I fix CVE-2026-108372?
Upgrade loopx to 0.4.5 or later.
Is CVE-2026-108372 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108372 exists.
Sources
Also known as GHSA-vx2m-gpq4-8j5q.