{"id":"CVE-2026-47840","aliases":["EUVD-2026-42518","GHSA-rh75-5vxf-83m5"],"status":"published","title":"LDAP StartTLS unconditionally disables hostname verification","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.\nAffected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.","severity":{"version":"4.0","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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00217,"percentile":0.12229,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2026-07-09T06:26:02Z","modified":"2026-07-09T16:39:17Z","products":[{"vendor":"cloud foundry","product":"cf-deployment"},{"vendor":"cloudfoundry foundation","product":"cf-deployment"},{"vendor":"cloudfoundry foundation","product":"uaa"}],"references":[{"url":"https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47840"},{"url":"https://www.cloudfoundry.org/blog/cve-2026-47840-ldap-starttls-unconditionally-disables-hostname-verification"},{"url":"https://github.com/advisories/GHSA-rh75-5vxf-83m5"}],"sources":{"cve":[{"id":"CVE-2026-47840","title":"LDAP StartTLS unconditionally disables hostname verification","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.\nAffected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.","status":"published","published":"2026-07-09T06:26:02.169Z","modified":"2026-07-09T12:49:24.26Z","cvss":[{"version":"4.0","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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T13:36:51.6229Z"}],"euvd":[{"id":"EUVD-2026-42518","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.\nAffected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.","status":"published","published":"2026-07-09T06:26:02Z","modified":"2026-07-09T12:49:24Z","cvss":[{"version":"4.0","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","level":"high"}],"updated_at":"2026-11-02T18:20:04.895477Z"}],"ghsa":[{"id":"GHSA-rh75-5vxf-83m5","title":"A network attacker positioned between UAA and its LDAP directory can impersonate the directory...","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.\nAffected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.","status":"published","published":"2026-07-09T09:30:28Z","modified":"2026-07-09T09:30:35Z","cvss":[{"version":"4.0","score":9.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:09:20.981798Z"}],"nvd":[{"id":"CVE-2026-47840","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.\nAffected versions: UAA versions prior to v78.13.0; Cf-deployment versions prior to v56.2.0.","status":"published","published":"2026-07-09T07:16:24.553Z","modified":"2026-07-09T16:39:17.737Z","cvss":[{"version":"4.0","score":9.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","level":"high","assessor":"secondary"}],"updated_at":"2026-11-02T14:12:28.4135Z"}]}}