Affects widely used identity-management stack (389-ds-base, FreeIPA, Red Hat IdM); critical DoS risk in enterprise IT.
CVE-2026-11610
Authenticated heap overflow in 389-ds-base SASL I/O enables DoS via oversized LDAP UNBIND.
Is CVE-2026-11610 being exploited?
Not confirmed. CVE-2026-11610 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-11610?
CVE-2026-11610 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-11610?
Yes. A fix has been recorded for CVE-2026-11610. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-11610 affect?
CVE-2026-11610 affects 389-ds-base (389 Directory Server), FreeIPA, Red Hat Identity Management (IdM). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-11610?
Monitor; patch when released; restrict LDAP exposure.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can crash the LDAP server by overflowing a heap buffer via oversized UNBIND after SSF>0.
Monitor only
- affected>= 1.3.2 and <= 3.3.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.