Cloud Foundry EUVD-2026-12667

Attacker must be on the same network segment (AV:A) and have bypassed firewall protections to access internal CAPI endpoints in Cloud Foundry Capi Release ≤1.226.0 or CF Deployment ≤v54.9.0. No authentication required. Requires network-level access to replace application droplets.

The CVSS 3.1 vector (AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) indicates this vulnerability requires adjacent network access with high attack complexity, but no privileges or user interaction, resulting in high impact to confidentiality, integrity, and availability. The adjacent network requirement (AV:A) and high complexity (AC:H) substantially reduce the attack surface compared to remotely exploitable vulnerabilities. The primary barrier is the prerequisite firewall bypass, which adds significant friction to exploitation. However, once an attacker achieves network positioning (through VPN compromise, insider threat, or lateral movement after initial breach), the lack of authentication (PR:N) makes exploitation straightforward. For organizations running Cloud Foundry in multi-tenant environments or where internal network segmentation is weak, this represents elevated risk. Without EPSS or KEV data available, prioritization should focus on exposure: internet-facing or multi-tenant Cloud Foundry deployments warrant immediate patching, while isolated internal development instances present lower urgency.

An attacker who has gained access to an adjacent network segment through compromised VPN credentials or by exploiting a separate perimeter vulnerability identifies unprotected Cloud Foundry CAPI internal endpoints through network reconnaissance. Without requiring authentication, the attacker crafts API requests to replace legitimate application droplets with malicious versions containing backdoors or data exfiltration code. When Cloud Foundry deploys these compromised droplets, the attacker gains access to application secrets, database credentials, and sensitive customer data processed by the affected applications.