CVE-2026-47840

LDAP StartTLS unconditionally disables hostname verification

Published Jul 9, 2026 CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-297
Type Values Removed Values Added
Weaknesses CWE-297
Type Values Removed Values Added
Weaknesses CWE-297
Type Values Removed Values Added
Weaknesses CWE-290
CWE-295
Type Values Removed Values Added
Weaknesses CWE-290
CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-295
Type Values Removed Values Added
Weaknesses CWE-640
Type Values Removed Values Added
Weaknesses CWE-640
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cloudfoundry
Cloudfoundry cf-deployment
Cloudfoundry uaa
Vendors & Products Cloudfoundry
Cloudfoundry cf-deployment
Cloudfoundry uaa
Type Values Removed Values Added
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.
Title LDAP StartTLS unconditionally disables hostname verification
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Jul 9, 2026, 12:49 PM
Reserved
May 20, 2026, 10:00 AM
Status
Awaiting Analysis
Published
Jul 9, 2026, 7:16 AM
Modified
Jul 9, 2026, 4:39 PM