{"id":"CVE-2026-102731","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102731","generatedAt":"2026-10-28T00:59:32.663Z","title":"Memory allocation with excessive size value vulnerability in Apache Directory LDAP API.","description":"Memory allocation with excessive size value vulnerability in Apache Directory LDAP API.\n\n\n\nA malicious peer (or a MITM) can send a small BER-encoded response causing a large memory allocation before any data is received. This can lead to an OutOfMemoryError and denial of service.\n\n\n\nThe client JVM OOMs (OutOfMemoryError bypasses the DecoderException handlers) or pins the large allocation per connection while the attacker stalls.\n\n\n\nA handful of connections exhausts any heap. The same bytes from an unauthenticated pre-bind client hit any embedding server that did not set MAX_PDU_SIZE_ATTR.\n\n\n\nThis issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9.\n\n\n\nUsers are recommended to upgrade to version 1.2.9, which fixes the issue.","published":"2026-10-02T10:17:05.000Z","lastModified":"2026-10-05T19:17:13.000Z","status":"Deferred","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-789"],"affected":[],"epss":{"score":0.0043,"percentile":0.37017,"date":"2026-10-26","history":[{"date":"2026-10-02","score":0.00193,"percentile":0.08132}]},"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 (0.43%). 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":"2026-10-05T21:15:06.000Z","detail":{"from":null,"score":"7.5","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.5 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-02T10:17:05.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-02T10:17:04.530Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://lists.apache.org/thread.html/b8kg8881pc0v8lp59w0fcfrs69wjbqvd","source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/02/3","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102731","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."}