CVE-2026-47840
LDAP StartTLS unconditionally disables hostname verification
- State
- Published
- Severity
- 8.3 High
- Published
- Jul 9, 2026
- Updated
- Jul 9, 2026
- Reserved
- May 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | 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 | vmware |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N | vmware |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
UAACloudFoundry Foundation |
|
Cf-deploymentCloudFoundry Foundation |
|
References
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