CVE-2026-76560
389-ds-base: 389-ds: anonymous ldap client can defeat selfdn aci bind-rule checks via empty bind dn
No known exploitation. EPSS puts it in the 48th percentile. Only a workaround so far.
What to do
No fixed build is published yet. The vendor describes a workaround.
What it is
From the CVE record
A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.6% chance of exploitation activity in the next 30 days, which ranks it in the 48th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
18 events over 2 days, from the signal feeds we watch.
- OpenVAS check added
- Workaround availableworkaround available, workaround available, workaround available, workaround available, workaround available, record updated, record updated, record updated, record updated, record updated, record updated
- Workaround availablepublished, weakness classified, att&ck mapped, record updated
Affected products
- Red Hat Directory Server 11.7 E4S for RHEL 8Enterprise Software / itsm-monitoring
- Red Hat Directory Server 11.9 for RHEL 8Databases / db-tooling
- Red Hat Directory Server 12.2 E4S for RHEL 9Enterprise Software / itsm-monitoring
- Red Hat Directory Server 12.4 E4S for RHEL 9Databases / relational
- Red Hat Enterprise Linux 10Operating Systems / linux-distro
- Red Hat Enterprise Linux 10.0 Extended Update SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 7 Extended Lifecycle SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportOperating Systems / linux-distro
And 15 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- access.redhat.com/errata/RHSA-2026:64771
- access.redhat.com/errata/RHSA-2026:64776
- access.redhat.com/errata/RHSA-2026:64778
And 15 more references. See all after sign-in
In the news
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