Return to Threats

Critical Bifrost AI Gateway Flaw Lets Attackers Run Commands Without Credentials

thehackernews.com 2026-09-22 AI supply chain Critical

What Happened

A critical vulnerability in Bifrost, an open-source AI gateway that routes requests to more than 20 LLM providers, allows an unauthenticated attacker to run arbitrary commands on the gateway server with a single HTTP request. The flaw, tracked as CVE-2026-90898 (CVSS score: 9.8), affects all versions of the Bifrost HTTP transport before 2.1.0 when management authentication is

Why It Matters

Reported facts: CVE-2026-90898 is a CVSS 9.8 vulnerability in Bifrost HTTP transport versions before 2.1.0 when management authentication is disabled, allowing an unauthenticated attacker to execute arbitrary commands through a single HTTP request. The issue affects an AI gateway that routes requests to multiple LLM providers, and version 2.1.0 reportedly blocks unauthenticated MCP stdio registration. RealGround analysis: organizations using affected Bifrost deployments should inventory versions and configurations, upgrade promptly, review gateway exposure and logs, and assess potential compromise because the flaw enables code execution in a shared AI infrastructure component.

Healthcare Fintech SaaS SMB AI startups

RealGround Analysis

This signal maps to AI supply chain. Organizations using AI agents, LLM APIs, SaaS integrations, or sensitive data workflows should review whether this class of issue could create unauthorized tool execution, data leakage, weak approval gates, or unmanaged supply-chain exposure.

Recommended Actions

  • Restrict AI agent tool permissions and production write paths.
  • Review sensitive data access across prompts, logs, embeddings, memory, and SaaS integrations.
  • Add human approval workflows for high-impact or state-changing actions.
  • Run prompt injection and indirect prompt injection tests against affected workflows.
  • Document the owner, control gap, and remediation deadline for this risk class.

Source

https://thehackernews.com/2026/09/critical-bifrost-ai-gateway-flaw-lets.html

Talk to AI CISO