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

Description (CNA)

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 (CNA)

Vendor / product	Versions
CloudFoundry Foundation / UAA	affected 0 before 78.13.0
CloudFoundry Foundation / Cf-deployment	affected 0 before 56.2.0

CWE

No CWE identifiers supplied.

References

https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.