PT-2026-139866

CVE-2026-123585

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Published

2026-11-08

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Updated

2026-11-08

Description by

CVSS 3.1
5.3
Medium
MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The hickory-resolver component of Hickory DNS 0.25.0 before 0.26.2 follows irrelevant CNAME records when resolving recursive queries, sending queries that are unnecessary to answer the original request. Attackers controlling DNS responses can include CNAME records in the authority or additional sections, or outside the original query name's CNAME chain, causing excess resolver queries and increased query amplification.
Exploitability
Fix
Impacts
Researchers
Vendors
Affected products
Weakness enumeration
CWE-400: Uncontrolled Resource Consumption
Related identifiers
CVE-2026-123585
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