CVE-2026-40965_CVE-2026-40965

10 / 10

CRITICAL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

Description

Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a vulnerability where EC (Elliptic Curve) private keys are inadvertently exposed through the public /token_keys endpoint. This endpoint is designed to provide public key material for JWT token verification but incorrectly exposes private key components for EC keys. The vulnerability affects deployments using EC keys for JWT token signing. The vulnerability does not affect RSA key configurations, only deployments using EC keys for JWT signing.

Affected versions:
- uaa_release: v76.12.0 through v78.12.0 (inclusive); fixed in v78.13.0 or later
- CF Deployment: v30.0.0 through v56.0.0 (inclusive); fixed in v56.1.0 or later (bundles uaa_release v78.13.0)

AI Analysis

Private key exposure vulnerability in Cloud Foundry UAA

Basic Information

ID CVE-2026-40965

Source vmware

Published Jun 1, 2026 at 21:22

Affected Product

Vendor Cloud Foundry Foundation

Product uaa_release

Version 76.12.0

Affected Versions Cloud Foundry Foundation uaa_release 76.12.0
Cloud Foundry Foundation CF Deployment 30.0.0

CWE Classification

CWE-200

AI Assessment

AI Score 10 / 10

AI Severity Critical

Vendor Cloud Foundry Foundation

Product Cloud Foundry UAA

Version v76.12.0 through v78.12.0

References

www.cloudfoundry.org /blog/cve-2026-40965-uaa-ec-private-key-disclosure/

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