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CVE-2026-11790— 389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial of service

Quick assessment

Affected
Red Hat Red Hat Directory Server 11
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

389 Directory Server是389 Directory Server开源的一个高度可用、功能齐全、可靠和安全的LDAP服务器实现。 389 Directory Server存在资源管理错误漏洞，该漏洞源于PBKDF2-SHA256密码存储插件未对从存储密码哈希中提取的迭代次数强制执行上限，导致特权攻击者修改用户密码哈希后，在身份验证期间造成过度CPU消耗，从而导致拒绝服务。

CVSS 4.9 · Medium EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat Directory Server 11 any affected
Red Hat Red Hat Directory Server 12 any affected
Red Hat Red Hat Directory Server 13 any affected
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-11790

Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial of service
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
389 Directory Server是389 Directory Server开源的一个高度可用、功能齐全、可靠和安全的LDAP服务器实现。 389 Directory Server存在资源管理错误漏洞，该漏洞源于PBKDF2-SHA256密码存储插件未对从存储密码哈希中提取的迭代次数强制执行上限，导致特权攻击者修改用户密码哈希后，在身份验证期间造成过度CPU消耗，从而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Directory Server 11 - cpe:/a:redhat:directory_server:11
Red Hat Red Hat Directory Server 12 - cpe:/a:redhat:directory_server:12
Red Hat Red Hat Directory Server 13 - cpe:/a:redhat:directory_server:13
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-11790

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III. Intelligence Information for CVE-2026-11790

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Vendor Advisories for CVE-2026-11790 (3)

Same Patch Batch · Red Hat · 2026-06-09 · 9 CVEs total

CVE-2026-11788 5.9 MEDIUM 389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser
CVE-2026-11787 5.0 MEDIUM 389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter p
CVE-2026-11793 4.9 MEDIUM 389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing
CVE-2026-11789 4.9 MEDIUM 389-ds-base: 389-ds-base: smd5 password storage plugin salt length integer underflow crash
CVE-2026-52902 4.7 MEDIUM Awxkit: path traversal via yaml !include directive
CVE-2026-11785 4.3 MEDIUM 389-ds-base: 389-ds-base: partial stack address information leak via ber_printf type confu
CVE-2026-11792 3.3 LOW 389-ds-base: 389-ds-base: heap buffer overflow in audit log password masking (create_maske
CVE-2026-11786 1.9 LOW 389-ds-base: 389-ds-base: heap out-of-bounds read in ldif parser str2entry_state_informati

IV. Related Vulnerabilities

Same product: Red Hat Directory Server 11
Same vendor: Red Hat
Same weakness: CWE-400

V. Comments for CVE-2026-11790

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