CVE-2026-47840 – LDAP StartTLS unconditionally disables hostname verification

CVE ID :CVE-2026-47840

Published : July 9, 2026, 7:16 a.m. | 32 minutes ago

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.

Severity: 9.3 | CRITICAL

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