A flaw was found in 389-ds-base. The Cockpit 389 Console's LDAP editor constructs an ldapsearch command by embedding an LDAP entry's distinguished name (DN) into a shell command string without proper escaping. An LDAP user with delegated privileges to create or rename directory entries could craft a malicious DN containing shell metacharacters. When a Cockpit administrator subsequently views the entry in the 389 Console, the embedded shell command executes with root privileges on the directory server host.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:64793 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of packages includes the     Lightweight Directory Access Protocol (LDAP) server, as well as command-line utilities and Web UI packages     for server administration.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Directory Server 11.9 for RHEL 8     Release Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:64780 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of packages includes the     Lightweight Directory Access Protocol (LDAP) server, as well as command-line utilities and Web UI packages     for server administration.

    Security Fix(es):

    * 389-ds-base: 389-ds-base: heap buffer overflow via SASL wrapped-record length lower-bound underflow in     sasl_io_start_packet() (CVE-2026-18355)

    * 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and     USE_ONE_BACKEND control in op_shared_search (CVE-2026-18453)

    * 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via     stale identity in Cyrus SASL auxiliary property (CVE-2026-18922)

    * 389-ds-base: 389-ds-base: Command injection via unescaped LDAP DN in Cockpit 389 Console LDAP editor     (CVE-2026-19843)

    * 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN     (CVE-2026-76560)

    Bug Fix(es) and Enhancement(s):

    * lib389: set nsDS5ReplicaBindDNGroup before ensure_agreement() [dirsrv-12.4.z] (JIRA:DIRSRV-869)

    * fix breaks replication total init when nsDS5ReplicaBindDNGroup is set after agreement creation     [dirsrv-12.4.z] (JIRA:DIRSRV-901)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:64779 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of packages includes the     Lightweight Directory Access Protocol (LDAP) server, as well as command-line utilities and Web UI packages     for server administration.

    Security Fix(es):

    * 389-ds-base: 389-ds-base: heap buffer overflow via SASL wrapped-record length lower-bound underflow in     sasl_io_start_packet() (CVE-2026-18355)

    * 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and     USE_ONE_BACKEND control in op_shared_search (CVE-2026-18453)

    * 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via     stale identity in Cyrus SASL auxiliary property (CVE-2026-18922)

    * 389-ds-base: 389-ds-base: Command injection via unescaped LDAP DN in Cockpit 389 Console LDAP editor     (CVE-2026-19843)

    * 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN     (CVE-2026-76560)

    Bug Fix(es) and Enhancement(s):

    * lib389: set nsDS5ReplicaBindDNGroup before ensure_agreement() [dirsrv-12.2.z] (JIRA:DIRSRV-868)

    * fix breaks replication total init when nsDS5ReplicaBindDNGroup is set after agreement creation     [dirsrv-12.2.z] (JIRA:DIRSRV-900)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:64782 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of packages includes the     Lightweight Directory Access Protocol (LDAP) server, as well as command-line utilities and Web UI packages     for server administration.

    Security Fix(es):

    * 389-ds-base: 389-ds-base: Command injection via unescaped LDAP DN in Cockpit 389 Console LDAP editor     (CVE-2026-19843)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:64769 advisory.

    389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the     Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Directory Server 13.0 EUS for RHEL 10     Release Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:64792 advisory.

    Red Hat Directory Server is an LDAPv3-compliant directory server. The suite of packages includes the     Lightweight Directory Access Protocol (LDAP) server, as well as command-line utilities and Web UI packages     for server administration.

    Security Fix(es):

    * 389-ds-base: 389-ds-base: heap buffer overflow via SASL wrapped-record length lower-bound underflow in     sasl_io_start_packet() (CVE-2026-18355)

    * 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and     USE_ONE_BACKEND control in op_shared_search (CVE-2026-18453)

    * 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via     stale identity in Cyrus SASL auxiliary property (CVE-2026-18922)

    * 389-ds-base: 389-ds-base: Command injection via unescaped LDAP DN in Cockpit 389 Console LDAP editor     (CVE-2026-19843)

    * 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN     (CVE-2026-76560)

    Bug Fix(es) and Enhancement(s):

    * lib389: set nsDS5ReplicaBindDNGroup before ensure_agreement() [dirsrv-11.7.z] (JIRA:DIRSRV-866)

    * fix breaks replication total init when nsDS5ReplicaBindDNGroup is set after agreement creation     [dirsrv-11.7.z] (JIRA:DIRSRV-898)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:64768 advisory.

    389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the     Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Directory Server 13.2 for RHEL 10     Release Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in 389-ds-base. The Cockpit 389 Console's LDAP editor constructs an ldapsearch command by     embedding an LDAP entry's distinguished name (DN) into a shell command string without proper escaping. An     LDAP user with delegated privileges to create or rename directory entries could craft a malicious DN     containing shell metacharacters. When a Cockpit administrator subsequently views the entry in the 389     Console, the embedded shell command executes with root privileges on the directory server host.
    (CVE-2026-19843)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
343798	RHEL 8 : redhat-ds:11 (RHSA-2026:64793)	Nessus	Red Hat Local Security Checks	Local	critical
343797	RHEL 9 : redhat-ds:12 (RHSA-2026:64780)	Nessus	Red Hat Local Security Checks	Local	critical
343768	RHEL 9 : redhat-ds:12 (RHSA-2026:64779)	Nessus	Red Hat Local Security Checks	Local	critical
343756	RHEL 9 : redhat-ds:12 (RHSA-2026:64782)	Nessus	Red Hat Local Security Checks	Local	high
343754	RHEL 10 : 389-ds-base (RHSA-2026:64769)	Nessus	Red Hat Local Security Checks	Local	high
343753	RHEL 8 : redhat-ds:11 (RHSA-2026:64792)	Nessus	Red Hat Local Security Checks	Local	critical
343750	RHEL 10 : 389-ds-base (RHSA-2026:64768)	Nessus	Red Hat Local Security Checks	Local	high
343492	Linux Distros Unpatched Vulnerability : CVE-2026-19843	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-19843

high

Tenable Plugins

critical

critical

critical

high

high

critical

high

high