CVE-2026-12528
389-ds-base: 389-ds-base: heap-buffer-overflows in __aclp__normalize_acltxt()
Description
A flaw was found in 389 Directory Server in the __aclp__normalize_acltxt() function of aclparse.c. A malformed ACI (Access Control Instruction) string can trigger heap-buffer-overflow writes and reads during ACI parsing. The function fails to validate that the ACI keyword has sufficient length after whitespace stripping, leading to a 1-byte out-of-bounds write and subsequent out-of-bounds reads. An authenticated user with write access to the aci attribute could send a crafted ACI value to silently corrupt heap memory in the directory server process.
INFO
Published Date :
June 17, 2026, 2:27 p.m.
Last Modified :
June 17, 2026, 2:27 p.m.
Remotely Exploit :
Yes !
Source :
redhat
Affected Products
The following products are affected by CVE-2026-12528
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 53f830b8-0a3f-465b-8143-3b8a9948e749 |
Solution
- Update 389 Directory Server to the latest version.
- Apply vendor-provided security patches.
- Review and sanitize ACI strings.
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The following list is the news that have been mention
CVE-2026-12528 vulnerability anywhere in the article.