Hi,

The following vulnerability was published for 389-ds-base.

CVE-2026-12528[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-12528
https://www.cve.org/CVERecord?id=CVE-2026-12528
[1] https://bugzilla.redhat.com/show_bug.cgi?id=2489835
[2] https://github.com/389ds/389-ds-base/issues/7541
[3] https://github.com/389ds/389-ds-base/pull/7542

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore