CVE-2026-123598
Received
Received - Intake
DNSSEC Validation Failure in Hickory DNS Recursor
Vulnerability report for CVE-2026-123598, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-08
Last updated on: 2026-11-08
Assigner: VulnCheck
Description
Description
The validating recursor in Hickory DNS hickory-recursor 0.25.0 through 0.26.0-alpha.1, hickory-resolver 0.26.0-alpha.1 before 0.26.2, and hickory-net 0.26.0-beta.1 before 0.26.2 caches DNSSEC-bogus answers using the untrusted, attacker-supplied record TTL (capped at 24 hours) instead of a short validation-failure TTL. A remote attacker who spoofs a single authoritative response with an invalid signature and a long TTL can keep the bogus result cached for up to 24 hours.
CVSS Scores
EPSS Scores
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| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| hickory | hickory-recursor | From 0.25.0 (inc) to 0.26.0-alpha.1 (inc) |
| hickory | hickory-resolver | to 0.26.2 (exc) |
| hickory | hickory-net | From 0.26.0-beta.1 (inc) to 0.26.2 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-613 | According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." |
