CVE-2026-47840
LDAP StartTLS unconditionally disables hostname verification
Description
A network attacker positioned between UAA and its LDAP directory can impersonate the directory using any certificate from any trusted CA, then harvest the LDAP bind password and every end-user password sent during simple-bind authentication, and return forged group memberships that grant themselves admin scopes. This affects every deployment that authenticates users against LDAP over StartTLS. Affected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.
CVSS Vector Breakdown
AV:NAttack VectorAC:HAttack ComplexityPR:NPrivileges RequiredUI:NUser InteractionS:CScopeC:LConfidentialityI:HIntegrityA:NAvailabilityAffected Products
Exploitability
References
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2026-47840 and every CVE in our database. Create a free account — no credit card required.
Create Free Account