Improper authentication in Red Hat Directory Server 11
Priority LOW 24CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-287.
Summary
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 subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00282 20th percentileScored 2026-11-07
Fix Deferred Red Hat: fix deferred
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Directory Server 11 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Directory Server 12 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Directory Server 13 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 10 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | Not affected | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | No fix listed | CNA |
- Red Hat Directory Server 11 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Directory Server 12 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Directory Server 13 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — Not affected CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:* | 13.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Red Hat |
- cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:* Versions 13.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Red Hat
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Directory Server 11 | Affected | No fix yet: Fix deferred |
| Red Hat Directory Server 12 | Affected | No fix yet: Fix deferred |
| Red Hat Directory Server 13 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18651
- 2026-10-03 Alias added: GHSA-q924-9ph6-5h92
References
More Red Hat 389 Directory Server vulnerabilities
- TI-2026-13229 Stack-based buffer overflow in Red Hat Directory Server 11.5 E4S for RHEL 8 CVSS 3.1HIGH 7.5
- TI-2026-07965 Resource allocation without limits in 389-ds-base CVSS 3.1HIGH 7.5
- TI-2026-10157 389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check CVSS 3.1HIGH 7.5
- TI-2024-05784 389-ds-base: unauthenticated user can trigger a dos by sending a specific extended search request CVSS 3.1MEDIUM 6.5
- TI-2022-01808 Authorization bypass in 389-ds-base CVSS 3.1HIGH 7.5
- TI-2010-02131 NULL pointer dereference in Red Hat Directory Server CVSS 3.1HIGH 7.5
Sources
- CVE-2026-18651 · CVE Program
- CVE-2026-18651 · NVD
- FIRST EPSS
- GHSA-q924-9ph6-5h92 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-18651 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences