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CVE-2026-40965

Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure.

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 78.13.0, 56.1.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

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)

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Cloud Foundry Foundation uaa_release

    From 76.12.0 · fixed in 78.13.0

  • Cloud Foundry Foundation CF Deployment

    From 30.0.0 · fixed in 56.1.0

References 1

cloudfoundry.org