DNS over HTTPS ACL bypass_CVE-2026-24029

6.5 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Description

When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.

Basic Information

ID CVE-2026-24029

Source OX

Published Mar 31, 2026 at 11:59

Modified Mar 31, 2026 at 13:15

Affected Product

Vendor PowerDNS

Product DNSdist

Version 1.9.0

Affected Versions PowerDNS DNSdist 1.9.0
PowerDNS DNSdist 2.0.0

CWE Classification

CWE-863

References

www.dnsdist.org /security-advisories/powerdns-advisory-for-dnsdist-2026-02.html

{
    "lastseen": "",
    "description": "When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.",
    "published": "2026-03-31T11:59:12.903Z",
    "modified": "2026-03-31T13:15:37.448Z",
    "type": "cve",
    "title": "DNS over HTTPS ACL bypass",
    "source": "OX",
    "references": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html",
    "id": "CVE-2026-24029",
    "bulletinFamily": "",
    "cwe": [
        "",
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "PowerDNS DNSdist 1.9.0\nPowerDNS DNSdist 2.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "DNSdist",
    "version": "1.9.0",
    "vendor": "PowerDNS",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}