Silent Lynx Exploitat WinRAR Vitium ad Instruendum Reverse Shell in Attacis Regni CIS · 4h NGINX Corrigit 5 Vitia, Inclusa Possibili RCE et Bug TLS Qui Potest Saltare Client-Cert Checks · 7h Next.js Emittit Emendationem Extra Ordinem pro Duobus Criticis RCE Defectibus in Caching et SVG Processu · 7h Drupal Patches Criticum Core RCE Vitium Sine Login Via Contributis Modulis · 8h Vulnerabilitas in software Sparx Systems Enterprise Architect · 8h Curl verhelpt 'high' RCE-kwetsbaarheid gevonden door Anthropic · 8h Vulnerabilitates in Slican telephonis · 9h Palo Alto Networks monet ad abusum vulnerabilitatis in ignibus securitatis · 12h Cisco nuntiat activum abusus criticae vulnerabilitatis in Secure Email Gateway · 13h Langflow's Critica Authenticated RCE Vulnerabilitas Targetata in 1,423 Honeypot Exploit Conatibus · 13h Silent Lynx Exploitat WinRAR Vitium ad Instruendum Reverse Shell in Attacis Regni CIS · 4h NGINX Corrigit 5 Vitia, Inclusa Possibili RCE et Bug TLS Qui Potest Saltare Client-Cert Checks · 7h Next.js Emittit Emendationem Extra Ordinem pro Duobus Criticis RCE Defectibus in Caching et SVG Processu · 7h Drupal Patches Criticum Core RCE Vitium Sine Login Via Contributis Modulis · 8h Vulnerabilitas in software Sparx Systems Enterprise Architect · 8h Curl verhelpt 'high' RCE-kwetsbaarheid gevonden door Anthropic · 8h Vulnerabilitates in Slican telephonis · 9h Palo Alto Networks monet ad abusum vulnerabilitatis in ignibus securitatis · 12h Cisco nuntiat activum abusus criticae vulnerabilitatis in Secure Email Gateway · 13h Langflow's Critica Authenticated RCE Vulnerabilitas Targetata in 1,423 Honeypot Exploit Conatibus · 13h

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⚠️ Renuntiatio Vulnerabilitatis

CVE-2026-90898

CRITICAL CVSS 9.8 CVSS 3.1 📌 Awaiting Analysis

CVE-2026-90898 - Bifrost unauthenticated remote code execution via MCP stdio client registration

Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required.

The default is governance.auth_config.is_enabled=false. Auth off means every caller is a local admin. One unauthenticated POST /api/mcp/client is enough to run a program as the Bifrost process user (appuser on the official image).

transports/v2.1.0 refuses an unauthenticated stdio registration with 403. transports/v2.0.0 still allows it.

Publicatum: Sep 14, 2026 11:17

Ultima Mutatio: Sep 18, 2026 19:31