{"id":"CVE-2026-103877","aliases":["DEBIAN-CVE-2026-103877","EUVD-2026-91361","GHSA-v496-rffp-c5q7","UBUNTU-CVE-2026-103877"],"status":"published","title":"Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. \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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00469,"percentile":0.41109,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-502"],"published":"2026-10-02T10:08:42Z","modified":"2026-11-10T04:00:07Z","fixes":[{"ecosystem":"Debian:14","package":"apache-directory-api","fixed_in":["2.1.9-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-1","2.1.2-2","2.1.9-1"]},{"source":"osv","ecosystem":"Debian:13","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-2","2.1.9-1"]},{"source":"osv","ecosystem":"Debian:14","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.9-1"}]}],"versions":["2.1.2-2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~M20-3"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~M20-5","1.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-2build1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"apache-directory-api","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-2","2.1.2-2build1"]}],"products":[{"vendor":"apache software foundation","product":"apache directory ldap api"}],"references":[{"url":"https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw","tags":["vendor-advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/02/5","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103877"},{"url":"https://github.com/advisories/GHSA-v496-rffp-c5q7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-103877","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-103877","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103877","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/10/02/5","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-103877","title":"Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. \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.","status":"published","published":"2026-10-02T10:08:42.494Z","modified":"2026-10-07T22:07:09.152Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T13:34:37.420074Z"}],"euvd":[{"id":"EUVD-2026-91361","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. \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.","status":"published","published":"2026-10-02T10:08:42Z","modified":"2026-10-07T22:07:09Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:27:33.555595Z"}],"ghsa":[{"id":"GHSA-v496-rffp-c5q7","title":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue...","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. \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.","status":"published","published":"2026-10-02T12:31:09Z","modified":"2026-10-08T00:32:01Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:12:55.932488Z"}],"nvd":[{"id":"CVE-2026-103877","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. \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.","status":"published","published":"2026-10-02T10:17:06.437Z","modified":"2026-10-07T23:16:58.85Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:12:53.41762Z"}],"osv":[{"id":"DEBIAN-CVE-2026-103877","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.    A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE.     This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.    Users are recommended to upgrade to version 2.1.9, which fixes the issue.","status":"published","published":"2026-10-02T10:17:06.437Z","modified":"2026-11-10T04:00:07.166236718Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-10T04:22:10.004764Z"},{"id":"UBUNTU-CVE-2026-103877","description":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9. Users are recommended to upgrade to version 2.1.9, which fixes the issue.","status":"published","published":"2026-10-02T10:17:00Z","modified":"2026-10-17T12:57:58.814224622Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}