CVE-2026-11790 — MEDIUM (4.9)

Vulnerability 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 Score

4.9

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Redhat	Directory Server	11.0
Redhat	389 Directory Server	1.3.6.0
Redhat	Enterprise Linux	7.0

Related Weaknesses (CWE)

CWE-400

References

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

FAQ

What is CVE-2026-11790?

CVE-2026-11790 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 ...

How severe is CVE-2026-11790?

CVE-2026-11790 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-11790?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Directory Server, Redhat 389 Directory Server, Redhat Enterprise Linux.