Authentication Bypass in cf-auth-proxy for Cloud Foundry Foundation
CVE-2026-40964

7.5HIGH

Key Information:

Vendor

Cloud Foundry Foundation

Status
Log-cache Release
Cf Deployment
Vendor
CVE Published:
1 June 2026

What is CVE-2026-40964?

A significant vulnerability in the cf-auth-proxy component of Cloud Foundry allows unauthenticated attackers to exploit the system by minting a JSON Web Token (JWT). This token is accepted as a valid logs.admin token, permitting attackers to gain unauthorized read access to critical logs and metrics associated with every application and platform component. This incident underscores the importance of robust authentication mechanisms to ensure that sensitive information remains protected.

Affected Version(s)

CF Deployment 0 <= 55.?.0

log-cache_release 0 <= 3.2.6

References

https://www.cloudfoundry.org/blog/cve-2026-40964-read-acc...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.