{"id":"CVE-2026-103877","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103877","generatedAt":"2026-10-23T21:17:43.363Z","title":"Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.","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.","published":"2026-10-02T10:17:06.000Z","lastModified":"2026-10-07T23:16:59.000Z","status":"Deferred","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":[],"epss":{"score":0.00572,"percentile":0.46566,"date":"2026-10-22","history":[{"date":"2026-10-03","score":0.00386,"percentile":0.30308}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-08T00:45:11.000Z","detail":{"from":null,"score":"9.8","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.8 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-02T10:17:06.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-02T10:17:06.437Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw","source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/02/5","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103877","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}