389 directory server vulnerabilities and fixes

Recent CVEs affecting 389 directory server, with upgrade or downgrade steps. 3 tracked.

Also searched as: 389directoryserver.

389 directory server has 3 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 0. Most recent: 2026-08-03. Highest priority: CVE-2026-15722 (score 51/100).

• CVE-2026-15722 HIGH 7.5 DOWNGRADE MITIGATE A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base)
• CVE-2026-11770 HIGH 7.5 DOWNGRADE MITIGATE A flaw was found in 389 Directory Server
• CVE-2026-18651 MEDIUM 5.4 DOWNGRADE MITIGATE A flaw was found in 389 Directory Server

FAQ

How do I fix 389 directory server vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is 389 directory server being exploited right now?

None of the tracked 389 directory server CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which 389 directory server CVE should I patch first?

CVE-2026-15722 currently ranks highest (51/100): A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base).

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