Is CVE-2026-16560 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-16560?

CVE-2026-16560 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-16560

Description

A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.