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.
Metrics
Affected Vendors & Products
References
History
Thu, 12 Nov 2026 01:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Mon, 09 Nov 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Hickory-dns
Hickory-dns hickory-dns |
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| Vendors & Products |
Hickory-dns
Hickory-dns hickory-dns |
Sun, 08 Nov 2026 01:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Hickory DNS 0.25.0 before 0.26.2 Query Amplification via Irrelevant CNAME Records | |
| Weaknesses | CWE-400 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-11-08T01:38:18.261Z
Updated: 2026-11-10T17:57:43.009Z
Reserved: 2026-11-06T00:57:31.044Z
Link: CVE-2026-123585
Updated: 2026-11-10T16:29:32.176Z
Status : Deferred
Published: 2026-11-08T02:16:52.327
Modified: 2026-11-10T22:15:59.797
Link: CVE-2026-123585
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