Red Hat 389 Directory Server vulnerabilities

25 CVEs affecting Red Hat 389 Directory Server, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-18651, published 2026-08-03.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2018-10935, published 2018-09-11. Medium severity, CVSS 6.5. EPSS: 1.8% chance of exploitation in the next 30 days. A flaw was found in the 389 Directory Server that allows users to cause a crash in the LDAP server using ldapsearch with server side sort.
CVE-2020-35518, published 2021-03-26. Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days. When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of…
CVE-2022-0996, published 2022-03-23. Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days. A vulnerability was found in the 389 Directory Server that allows expired passwords to access the database to cause improper authentication.
CVE-2022-1949, published 2022-06-02. High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days. An access control bypass vulnerability found in 389-ds-base. That mishandling of the filter that would yield incorrect results, but as that has progressed, can be determined that it actually is an…
CVE-2010-2222, published 2019-11-05. High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days. The _ger_parse_control function in Red Hat Directory Server 8 and the 389 Directory Server allows attackers to cause a denial of service (NULL pointer dereference) via a crafted search query.
CVE-2021-3514, published 2021-05-28. Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days. When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted query, causing a crash.
CVE-2024-6237, published 2024-07-09. Medium severity, CVSS 6.5. EPSS: 0.9% chance of exploitation in the next 30 days. A flaw was found in the 389 Directory Server. This flaw allows an unauthenticated user to cause a systematic server crash while sending a specific extended search request, leading to a denial of…
CVE-2026-15722, published 2026-07-31. High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days. A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into…
CVE-2026-9064, published 2026-05-20. High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days. 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…
CVE-2026-11788, published 2026-06-09. High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the…

Latest

CVE-2026-18651, published 2026-08-03. Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is…
CVE-2026-11770, published 2026-07-31. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. An unauthenticated remote attacker can inject LDAP search filters into the CleanAllRUV replication status-check extended operation. Because the handler…
CVE-2026-15041, published 2026-07-08. Low severity, CVSS 3.7. EPSS: 0.4% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password verification function uses standard memcmp() for comparing password hashes instead of a constant-time comparison function. A…
CVE-2026-14969, published 2026-07-07. Medium severity, CVSS 4.4. EPSS: 0.1% chance of exploitation in the next 30 days. A flaw was found in 389-ds-base where the LDBM backend attribute encryption uses a hardcoded static initialization vector for AES-CBC and 3DES-CBC operations, allowing an attacker with privileged…
CVE-2026-14940, published 2026-07-07. Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days. A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a multivalued nested Relative…
CVE-2026-11791, published 2026-06-18. Medium severity, CVSS 5.0. EPSS: 0.4% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred…
CVE-2026-12528, published 2026-06-17. Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server in the __aclp__normalize_acltxt() function of aclparse.c. A malformed ACI (Access Control Instruction) string can trigger heap-buffer-overflow writes and…
CVE-2026-11793, published 2026-06-09. Medium severity, CVSS 4.9. EPSS: 0.3% chance of exploitation in the next 30 days. A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when…
CVE-2026-11790, published 2026-06-09. Medium severity, CVSS 4.9. EPSS: 0.3% chance of exploitation in the next 30 days. A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker…