{"id":"CVE-2026-103878","title":"Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API.\n\n\n\nA StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has…","summary":"Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API.\n\n\n\nA StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-345"],"vendor":"Apache Software Foundation","product":"org.apache.directory.api:api-ldap-client-api","affected":["org.apache.directory.api:api-ldap-client-api >= 2.1.0 < 2.1.9"],"published":"2026-10-02","updated":"2026-10-05","sourceUpdated":"2026-10-05T19:17:13.993","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103878","references":[{"url":"https://lists.apache.org/thread.html/d98f9w01nd3zmkwrr21y0l9kdr9jpty9","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/02/6","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-05T18:47:45.486494Z"},"epss":0.00202,"epssPercentile":0.10071,"ingestedAt":"2026-10-02T10:15:55.903Z","slug":"CVE-2026-103878","body":"## Overview\n\nCleartext transmission of sensitive information vulnerability in Apache Directory LDAP API.\n\n\n\nA StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has been completed.\n\n\n\nThis issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.\n\n\n\nUsers are recommended to upgrade to version 2.1.9, which fixes the issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":216010,"id":"CVE-2026-103878","ts":1791228729372,"field":"cvss","old":null,"new":"7.5"},{"seq":216009,"id":"CVE-2026-103878","ts":1791228729372,"field":"severity","old":"none","new":"high"}]}