Vulnerability · Published Jun 11, 2026 · Assigned by vmware
CVE-2026-41005UAA accepts SAML Encrypted Assertions authentication bypass
Critical 9.0
In plain English
A critical-severity security flaw in CF Deployment from Cloud Foundry. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cloud Foundry | UAA | 2.0.0 – before 78.14.0 |
| Cloud Foundry | CF Deployment | 0.0.0 – before 57.0.0 |
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H