CVE-2025-30187 LOW

CVE-2025-30187: Denial of service via crafted DoH exchange in PowerDNS DNSdist

Vendor Powerdns
Product DNSdist
Weakness CWE-835
Published September 18, 2025
Last update November 4, 2025
View on NVD All CVEs

CVSS base score

3.7/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.

Key dates

02Disclosure timeline

September 18, 2025 CVE published
November 4, 2025 Record updated