CVE-2026-11787— 389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter parsing
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存在安全漏洞，该漏洞源于ldap_utf8prev函数在未进行边界检查的情况下读取缓冲区之前的字节，导致字符串过滤器解析中出现堆缓冲区过度读取，可能影响内部过滤器处理行为。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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 |
unknown |
| 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-2026-11787
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter parsing
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in 389 Directory Server. The ldap_utf8prev() function reads bytes before the start of a buffer without bounds checking, causing a heap buffer over-read in string filter parsing that may influence internal filter processing behavior.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 安全漏洞
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存在安全漏洞，该漏洞源于ldap_utf8prev函数在未进行边界检查的情况下读取缓冲区之前的字节，导致字符串过滤器解析中出现堆缓冲区过度读取，可能影响内部过滤器处理行为。
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-2026-11787
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-11787 (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-2026-11793 | 4.9 MEDIUM | 389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing |
| CVE-2026-11790 | 4.9 MEDIUM | 389-ds-base: 389-ds-base: pbkdf2 password storage plugin unbounded iteration count denial |
| 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 |
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