---
id: "CVE-2026-125364"
page: "https://infrastack.ai/live/CVE-2026-125364"
kind: "vulnerability"
aliases: ["CVE-2026-125364"]
title: "frab: crew users can grant themselves organizer roles on any conference"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["frab", "package", "rails", "ruby", "self-hosted"]
not_affected_if: ["no-crew-users"]
published_at: "2026-11-10T00:17:08+00:00"
first_seen_at: "2026-11-10T00:28:42+00:00"
updated_at: "2026-11-10T00:29:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125364", "first_seen_at": "2026-11-10T00:28:42+00:00"}]
exploit_sources: []
---

# frab: crew users can grant themselves organizer roles on any conference

Link for people: https://infrastack.ai/live/CVE-2026-125364 (this .md is for agents)

frab, a conference planning application, lets an authenticated crew user submit nested conference user attributes that are not checked. A crew member can grant themselves the orga role on any conference and then manage its events, schedule, reviewers and crew.

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

## How to check

- Check the installed frab version; the sources say versions through 0.9.1 are affected.
- Review whether crew accounts can reach the user create and update endpoints in the application.

## Fix

- Move to a frab release later than `0.9.1`; the sources do not name the fixed version.

## Timeline

- 2026-11-10T00:28:42+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125364

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/frab-through-0.9.1-privilege-escalation-via-conference-users-attributes-in-userscontroller
- [fix] Patch: github.com https://github.com/frab/frab/commit/8d14d491ac73f2e19030e95a86b6575106270eeb

## From the sources

frab through 0.9.1 contains a privilege escalation vulnerability that allows authenticated crew users to grant themselves orga roles by submitting unchecked nested conference_users_attributes. Attackers can abuse UsersController#update or #create, which skip filter_conference_users, to gain orga on any conference and fully manage its events, schedule, reviewers and crew.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_