CVE-2026-42254

MEDIUMNVD 4.04.0—

4.0

Hickory DNS hickory-recursor 0.1 through 0.25.2 allows cross-zone poisoning because cached data is not directly associated with a query that triggered a response.

CVSS v3: 4.0
EG Score: 4.0(high)
EPSS: 12.9%
KEV: Not listed

Published

April 26, 2026

Last Modified

April 27, 2026

References (1)

cve@mitrehttps://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-83hf-93m4-rgwq

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-706

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 15:38 UTCEG score recompute
2026-05-20 15:37 UTCGHSA enrichment
2026-05-20 11:22 UTCepss_batch

Frequently asked(5)

What is CVE-2026-42254?

CVE-2026-42254 is a medium vulnerability published on April 26, 2026. Hickory DNS hickory-recursor 0.1 through 0.25.2 allows cross-zone poisoning because cached data is not directly associated with a query that triggered a response.

When was CVE-2026-42254 disclosed?

CVE-2026-42254 was first published in the National Vulnerability Database on April 26, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-42254 actively exploited?

CVE-2026-42254 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-42254?

CVE-2026-42254 has a CVSS v3 base score of 4.0 (NVD).

How do I remediate CVE-2026-42254?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42254, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-42254

📅 Published

🔄 Last Modified

🔗 References (1)