How severe is CVE-2026-11611?

CVE-2026-11611 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-11611 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-11611?

CVE-2026-11611 primarily affects Redhat Directory Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-11611?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-11611 have an EU (EUVD) identifier?

Yes. CVE-2026-11611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35129.

When was CVE-2026-11611 published?

CVE-2026-11611 was published on 2026-06-08 and last updated on 2026-06-30.

CVE-2026-11611

CVE-2026-11611 is a medium-severity vulnerability in Redhat Directory Server with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35129
Weakness: CWE-400
Affected product: Redhat Directory Server
Published: 2026-06-08
Last modified: 2026-06-30

Description

A flaw was found in 389 Directory Server. The Content Synchronization persistent search plugin allows unbounded memory growth when an authenticated client stops reading sync responses, enabling denial of service. Additional race conditions in plugin thread lifecycle can cause crashes during connection teardown or shutdown.

Frequently asked questions

What is CVE-2026-11611?: A flaw was found in 389 Directory Server. The Content Synchronization persistent search plugin allows unbounded memory growth when an authenticated client stops reading sync responses, enabling denial of service. Additional race conditions in plugin thread lifecycle can cause crashes during connection teardown or shutdown.
How severe is CVE-2026-11611?: CVE-2026-11611 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-11611 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-11611?: CVE-2026-11611 primarily affects Redhat Directory Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-11611?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-11611 have an EU (EUVD) identifier?: Yes. CVE-2026-11611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35129.
When was CVE-2026-11611 published?: CVE-2026-11611 was published on 2026-06-08 and last updated on 2026-06-30.

References

EU advisories (EUVD)

https://redhat.atlassian.net/browse/PSIRTSUPT-7600

Affected products (8)

cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

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