PT-2026-45616 · Cloud Foundry Foundation · Cf-Deployment+1

Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-40965

Mitre

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

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)

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-40965

Affected Products

Cf-Deployment

Uaa-Release

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-40965 · Security Note
• https://cloudfoundry.org/blog/cve-2026-40965-uaa-ec-private-key-disclosure · Note