# RHSA-2026:64804: 389-ds-base security update

RHSA-2026:64804, released September 10, 2026, fixes 4 CVEs in 389-ds-base (version 3.0.6-21.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-64804
- Platform: Linux
- Released: Sep 10, 2026
- Priority: Urgent (Closes CVE-2026-18922, rated Critical)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:64804

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [389-ds-base](https://patchblox.com/security/data/product/linux/389-ds-base.md) | RHEL 10 | 3.0.6-21.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-18922](https://patchblox.com/security/data/cve/CVE-2026-18922.md) | Urgent | 389-ds-base: A flaw was found in 389 Directory Server | 9.8 | 0.0056 |  |
| [CVE-2026-18453](https://patchblox.com/security/data/cve/CVE-2026-18453.md) | High | 389-ds-base: A flaw was found in 389 Directory Server | 9.8 | 0.0085 |  |
| [CVE-2026-18355](https://patchblox.com/security/data/cve/CVE-2026-18355.md) | High | 389-ds-base: A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base) | 9.8 | 0.0084 |  |
| [CVE-2026-76560](https://patchblox.com/security/data/cve/CVE-2026-76560.md) | High | 389-ds-base: A flaw was found in 389 Directory Server | 9.8 | 0.0056 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo