CVE-2026-47840
highpriority · track · 0EPSS 0.002 · 12 %ileEUEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.3
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (3)
External citations — patches, advisories, analysis.
- https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification/cnnvd
- https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification/enisa_euvd
- https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification/nvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan