---
id: "CVE-2026-65965"
page: "https://infrastack.ai/live/CVE-2026-65965"
kind: "vulnerability"
aliases: ["CVE-2026-65965"]
title: "ideon: read-only viewers can overwrite or wipe project canvases"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["ideon", "other", "self-hosted"]
not_affected_if: ["patched-0.9.4-or-later"]
published_at: "2026-11-11T21:16:46+00:00"
first_seen_at: "2026-11-11T21:29:09+00:00"
updated_at: "2026-11-11T21:30:38+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65965", "first_seen_at": "2026-11-11T21:29:09+00:00"}]
exploit_sources: []
---

# ideon: read-only viewers can overwrite or wipe project canvases

Link for people: https://infrastack.ai/live/CVE-2026-65965 (this .md is for agents)

ideon is a self-hosted visual workspace. Users granted only the read-only viewer role on a project can call project write endpoints, including one that deletes all blocks and links and inserts attacker-supplied ones.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed ideon version; it is affected before `0.9.4`.
- Review which users hold the viewer role on projects, since only they can exploit this.

## Fix

- Upgrade ideon to `0.9.4` or later.

## Timeline

- 2026-11-11T21:29:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-65965

## Documents

- [advisory] Vendor advisory: github.com https://github.com/3xpyth0n/ideon/security/advisories/GHSA-v3qr-4v8m-29rh
- [fix] Patch: github.com https://github.com/3xpyth0n/ideon/commit/ed58ca7a70543c7fc4ebfef59a2ca34e480e44d1
- [fix] Release notes: github.com https://github.com/3xpyth0n/ideon/releases/tag/v0.9.4

## From the sources

ideon is a self-hosted visual workspace. Prior to version 0.9.4, several project mutation endpoints under /api/projects/[id]/* resolve the caller's project role but never enforce it, so a user who was granted only the read-only viewer role on a project can perform write operations on that project. The most severe is POST /api/projects/[id]/graph, which deletes every block and link in the project and re-inserts client-supplied ones. A viewer can silently rewrite or wipe the entire canvas of a project they were invited to read. The application clearly intends viewer to be read-only: the collaborators endpoint, the automation endpoints, and the realtime Yjs sync path all reject write attempts from viewers. These specific HTTP handlers simply omit the guard their siblings enforce. This issue has been patched in version 0.9.4.

---

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