CVE-2026-61598 Client mass-assignment of arbitrary view attributes via the default dj-model update_model handler
Attackers can modify arbitrary view attributes, including authorization state, via mass-assignment in djust, leading to privilege escalation or data manipulation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-61598?
CVE-2026-61598 is a high-severity missing authorization vulnerability in djust-org djust, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
djust provides Phoenix LiveView-style reactive server-side rendering for Django with Rust-powered performance. Prior to version 1.0.7, `djust.mixins.model_binding.ModelBindingMixin` provides a default `update_model` event handler and is part of the LiveView base MRO, so every LiveView exposes it. It `setattr`s a view attribute whose name is client-supplied (`field`), gated only by: reject `_`-prefixed names; reject a 14-entry denylist of framework internals (`FORBIDDEN_MODEL_FIELDS`); optional `allowed_model_fields` which defaults to None = allow all; and `hasattr` existence. As a result, a client can set any public, existing view attribute — not just the fields actually bound with `dj-model=` in the rendered template. The denylist covers framework plumbing but nothing about developer business/authz state, and the allowlist is opt-in (off by default). A developer who binds one `dj-model="search"` input and also keeps `self.account_id` / `self.is_admin` / `self.total_price` as view state does not realize a client can set ALL of them via `{type:event, event:"update_model", params:{field, value}}` over the WebSocket. Type coercion matches the target attribute's type (so `"true"` -> bool True), aiding the attacker. This issue is fixed in djust 1.0.7. As a workaround, set `allowed_model_fields` explicitly on every view using dj-model (or subclassing LiveView) to the minimal list of bindable fields; do not keep authorization/ownership state in public view attributes that share the view with dj-model bindings.
Weakness: CWE-915
Which versions are affected by CVE-2026-61598?
3 open source packages ship an affected version, including djust.
| Package | Affected | Fixed in |
|---|---|---|
djust PyPI | All versions | 1.0.7 |
djust PyPI | All versions | 1.0.7 |
djust PyPI | All versions | 1.0.7 |
How do I fix CVE-2026-61598?
Upgrade djust to 1.0.7 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-61598 being exploited?
There is no known exploitation of CVE-2026-61598 in the wild and no public exploit code.
Sources
Also known as GHSA-cc7c-9jff-58wj, PYSEC-2026-4042.