CVE-2026-0398

MEDIUMNVD 5.35.3—

5.3

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 0.7%
KEV: Not listed

Published

February 9, 2026

Last Modified

April 20, 2026

References (1)

security@open-xchangehttps://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html

Weakness Classification(1)

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

CWE-770Allocation of Resources Without Limits or Throttling

Data Freshness Timeline

(refreshed 18× 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
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Frequently asked(5)

What is CVE-2026-0398?

CVE-2026-0398 is a medium vulnerability published on February 9, 2026. Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

When was CVE-2026-0398 disclosed?

CVE-2026-0398 was first published in the National Vulnerability Database on February 9, 2026, with the most recent update on April 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-0398 actively exploited?

CVE-2026-0398 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-0398?

CVE-2026-0398 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2026-0398?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-0398, 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-2026-0398

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-0398?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)