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OpenAdvisories
High · 7.5 CVE-2026-47840 EUVD-2026-42518GHSA-rh75-5vxf-83m5

LDAP StartTLS unconditionally disables hostname verification

Published Jul 9, 2026 · Updated Jul 9, 2026 · Assigned by vmware

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.

Affected products

VendorProductAffectedFixed
CloudFoundry Foundation UAA < 78.13.0 78.13.0
CloudFoundry Foundation Cf-deployment < 56.2.0 56.2.0

References