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Vulnerability record · CVE-2026-11790 · published 9 June 2026

CVE-2026-11790: Redhat directory server uncontrolled resource consumption vulnerability

Redhat · Directory Server

A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker who can modify a user's password hash can cause excessive CPU consumption during authentication, resulting in denial of service.

4.9 CVSS 3.1 Medium EPSS 0.29% · top 80.5% CWE-400 · Uncontrolled resource consumption
4.9CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
23 Jul 2026Last modified by NVD

Description

A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password storage plugin does not enforce an upper bound on the iteration count extracted from stored password hashes. A privileged attacker who can modify a user's password hash can cause excessive CPU consumption during authentication, resulting in denial of service.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-11790 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2485421 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-11790), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.