CVE-2026-33286 Graphiti Affected by Arbitrary Method Execution via Unvalidated Relationship Names
Attackers can execute arbitrary methods on model instances via malicious JSONAPI payloads in Graphiti, leading to code execution or data modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33286?
CVE-2026-33286 is a critical code injection vulnerability in graphiti-api graphiti, published on 23 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Graphiti is a framework that sits on top of models and exposes them via a JSON:API-compliant interface. Versions prior to 1.10.2 have an arbitrary method execution vulnerability that affects Graphiti's JSONAPI write functionality. An attacker can craft a malicious JSONAPI payload with arbitrary relationship names to invoke any public method on the underlying model instance, class or its associations. Any application exposing Graphiti write endpoints (create/update/delete) to untrusted users is affected. The `Graphiti::Util::ValidationResponse#all_valid?` method recursively calls `model.send(name)` using relationship names taken directly from user-supplied JSONAPI payloads, without validating them against the resource's configured sideloads. This allows an attacker to potentially run any public method on a given model instance, on the instance class or associated instances or classes, including destructive operations. This is patched in Graphiti v1.10.2. Users should upgrade as soon as possible. Some workarounds are available. Ensure Graphiti write endpoints (create/update) are not accessible to untrusted users and/or apply strong authentication and authorization checks before any write operation is processed, for example use Rails strong parameters to ensure only valid parameters are processed.
Weakness: CWE-913
Which versions are affected by CVE-2026-33286?
2 open source packages ship an affected version, including graphiti. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
graphiti RubyGems | All versions | 1.10.2 |
graphiti RubyGems | All versions | 1.10.2 |
Products include Graphiti Graphiti.
How do I fix CVE-2026-33286?
Upgrade graphiti to 1.10.2 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33286 being exploited?
There is no known exploitation of CVE-2026-33286 in the wild and no public exploit code.
Sources
Also known as GHSA-3m5v-4xp5-gjg2.