CVE-2026-24029

MEDIUM 6.5

DNS over HTTPS ACL bypass

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	powerdns
Product	dnsdist
Published	Mar 31, 2026
Last Updated	Mar 31, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

PowerDNS / DNSdist

1.9.0 < 1.9.12 2.0.0 < 2.0.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Surya Narayan Kushwaha (aka Cavid)