389-ds-base: 389-ds-base: heap-buffer-overflows in __aclp__normalize_acltxt()_CVE-2026-12528

{
    "lastseen": "",
    "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.",
    "published": "2026-06-17T14:27:27.457Z",
    "modified": "2026-06-17T14:27:27.457Z",
    "type": "cve",
    "title": "389-ds-base: 389-ds-base: heap-buffer-overflows in __aclp__normalize_acltxt()",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-12528\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2489835\nhttps://github.com/389ds/389-ds-base/pull/7542",
    "id": "CVE-2026-12528",
    "bulletinFamily": "",
    "cwe": [
        "CWE-787"
    ],
    "cvelist": null,
    "sourceData": "",
    "sourceHref": "",
    "cvss": {
        "score": 5.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat Directory Server 11",
    "version": "",
    "vendor": "Red Hat",
    "ai_description": "",
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    "ai_score": 0
}