CVE-2026-40965 | BDVDB-2026-337052 Detail
Cloud Foundry Foundationuaa_release
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)
Impact#
An unauthenticated remote attacker can retrieve EC private key material from the public /token_keys endpoint, enabling full token forgery and complete compromise of confidentiality and integrity across all scoped systems (CVSS v3.1: C:H, I:H, A:L; scope: Changed).
Weaknesses#
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.