Vulnerability in Cloud Foundry Cf Deployment
CVE-2026-41005
Cloud Foundry UAA incorrectly treated XML encryption to the Service Provider (confidentiality) as a substitute for XML signatures from the Identity Provider (authenticity) in two SAML flows: the OAuth 2.0 SAML2 bearer grant (token endpoint) and browser SSO (ACS) when wantAssertionSigned is set to false. Assertions or responses that were unsigned but contained encrypted content could still be accepted. Encryption uses the SP's public key from published metadata, therefore, any party, not only a trusted IdP, can produce ciphertext UAA can decrypt; successful decryption therefore does not prove the IdP issued the message. Affected versions: Cloud Foundry UAA (uaa_release) 2.0.0 through 78.13.0. Cloud Foundry CF Deployment all versions through 56.1.0.
EPSS: 0.001 (3.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Cloud Foundry Cf Deployment — versions 0.0.0
- Cloud Foundry Uaa — versions 2.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-41005?
- CVE-2026-41005 is a critical-severity vulnerability in Cloud Foundry Cf Deployment, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.0/10. Published 2026-06-11.
- How severe is CVE-2026-41005?
- Critical severity. CVSS v3 base score is 9.0 out of 10.