Threats Tagged 'cve-2026-102731'

A vulnerability in Apache Directory LDAP API versions 1.2.0 through before 1.2.9 allows a malicious peer or man-in-the-middle to trigger excessive memory allocation by sending a small BER-encoded response. This can cause the client JVM to throw an OutOfMemoryError or exhaust heap memory, leading to denial of service. The issue is fixed in version 1.2.9.

Memory allocation with excessive size value vulnerability in Apache Directory LDAP API. A 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. The client JVM OOMs (OutOfMemoryError bypasses the DecoderException handlers) or pins the large allocation per connection while the attacker stalls. A 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. This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9. Users are recommended to upgrade to version 1.2.9, which fixes the issue.