What is CVE-2025-30187?

CVE-2025-30187 is a low-severity vulnerability in Powerdns Dnsdist, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 3.7/10. Published 2025-09-18.

How severe is CVE-2025-30187?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Powerdns Dnsdist

CVE-2025-30187

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…

EPSS: 0.000 (1.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Powerdns Dnsdist — versions 1.9.0, 2.0.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-05.html

Frequently asked questions

What is CVE-2025-30187?: CVE-2025-30187 is a low-severity vulnerability in Powerdns Dnsdist, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 3.7/10. Published 2025-09-18.
How severe is CVE-2025-30187?: Low severity. CVSS v3 base score is 3.7 out of 10.