CVE-2026-9064
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
20/05/2026
Last modified:
20/05/2026
Description
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH