CVE-2026-33258

MEDIUMNVD 5.35.3—

5.3

By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.

CVSS v3: 5.3
EG Score: 5.3(high)
EPSS: 0.0%
KEV: Not listed

Published

April 22, 2026

Last Modified

April 27, 2026

References (1)

security@open-xchangehttps://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.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 10× in last 7d / 12× 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
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 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
2026-05-20 16:17 UTCEG score recompute
2026-05-20 16:17 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-33258?

CVE-2026-33258 is a medium vulnerability published on April 22, 2026. By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.

When was CVE-2026-33258 disclosed?

CVE-2026-33258 was first published in the National Vulnerability Database on April 22, 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-2026-33258 actively exploited?

CVE-2026-33258 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-33258?

CVE-2026-33258 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2026-33258?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33258, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-33258

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CVE-2026-33258

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-33258?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)