CVE-2026-123572

HighCVSS 7.5/10Last modified Nov 12, 2026

Description

Hickory-dns from 0.20.1 before 0.26.2 contains a denial of service vulnerability in the hickory-proto SVCB and HTTPS record presentation format parser, which panics on malformed alpn values. Attackers can supply untrusted zone files with unbalanced quotes, consecutive commas, or invalid escapes in alpn parameters to crash parsing processes.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1286

Affected software

Vendor	Product	Versions
hickory-dns	hickory-dns	>= 0.20.1, < 0.26.2

References

Timeline

Published: Nov 8, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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