---
title: "CVE-2026-33286: Graphiti Affected by Arbitrary Method Execution via Unvalidated Relationship Names"
url: https://erroneo.us/security/cve/CVE-2026-33286/
description: "CVE-2026-33286 (graphiti (RubyGems)): Graphiti is a framework that sits on top of models and exposes them via a JSON:API-compliant interface. Versions prior…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-23
date_modified: 2026-03-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-33286"
kev: false
cvss: 9.1
epss: 0.00921
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-33286: Graphiti Affected by Arbitrary Method Execution via Unvalidated Relationship Names

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.9% , percentile 60: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 60% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes graphiti (RubyGems) <= 1.10.1, fixed in 1.10.2 . Check your lockfile, including transitive dependencies.

## What it is

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#allvalid? 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.

## Affected packages

- RubyGems `graphiti` <= 1.10.1 → fixed: 1.10.2

## Affected products (CVE record)

- graphiti-api graphiti: < 1.10.2

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.92% probability of exploitation activity in the next 30 days; percentile 60.

## Sources

- [GitHub Advisory GHSA-3m5v-4xp5-gjg2](https://github.com/advisories/GHSA-3m5v-4xp5-gjg2)
- [CVE.org record CVE-2026-33286](https://www.cve.org/CVERecord?id=CVE-2026-33286)
- [NVD entry CVE-2026-33286](https://nvd.nist.gov/vuln/detail/CVE-2026-33286)
- [github.com](https://github.com/graphiti-api/graphiti/security/advisories/GHSA-3m5v-4xp5-gjg2)
- [github.com](https://github.com/graphiti-api/graphiti/commit/ddb5ad2b69330774bd1a47935ed89a9fe4396a54)
- [github.com](https://github.com/graphiti-api/graphiti/releases/tag/v1.10.2)
- [github.com](https://github.com/rubysec/ruby-advisory-db/blob/master/gems/graphiti/CVE-2026-33286.yml)

---
Source page: https://erroneo.us/security/cve/CVE-2026-33286/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt