AI agent incident

An unauthenticated Bifrost AI gateway flaw ran commands from a single HTTP request

Reported · 1 source · CVE-2026-90898

What happened

CVE-2026-90898, rated CVSS 9.8, let an unauthenticated attacker run arbitrary commands on Bifrost AI gateway versions before 2.1.0 with one HTTP request.

Why it matters

A gateway holds the credentials for every model and service behind it, and this one asked for none. Patch to 2.1.0, then ask whether the management endpoints were ever meant to be reachable at all.

Sources

  1. The Hacker News Critical Bifrost AI Gateway Flaw Lets Attackers Run Commands Without Credentials

New incidents by email

Get incidents like this one in your inbox

New AI agent incidents are covered in the briefing, with what to check on the agents you already run. At least once a week, free.

You confirm by email. Unsubscribe in one click.

Background reading

What is an LLM gateway? An explainer on the problem behind this incident.

In the tools directory

This page lists this record as a related incident, next to the products in the category and questions to ask their vendors.

Cite or correct this record

“An unauthenticated Bifrost AI gateway flaw ran commands from a single HTTP request.” The Permission Layer AI Agent Incident Database, https://thepermissionlayer.com/incidents/bifrost-gateway-unauthenticated-rce/. Database updated October 22, 2026.

Every record traces to the dated sources above. If something here is wrong or missing, email [email protected] and it gets fixed. See this record in the full list.

The Permission Layer

Get the briefing by email

At least one email a week on AI agent identity, permissions, security and spend, written for the people who approve agent access. Five-minute read, free.

You confirm by email. Unsubscribe in one click.