CVE-2026-12528A flaw was found in 389 Directory Server in the __aclp__normalize_acltxt() function of aclparse.c.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat directory_server redhat:directory_server | 11.0; 12.0; 13.0 | NVD |
redhat 389_directory_server redhat:389_directory_server | all versions | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://access.redhat.com/security/cve/CVE-2026-12528vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2489835issue-tracking, vendor-advisory
- https://github.com/389ds/389-ds-base/pull/7542patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.