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Vulnerabilities

Vulnerability · CVE-2026-33258

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

Published Apr 22, 2026 · catalog updated Jun 17, 2026 · By publishing and querying

Check if you run it

No confirmed exploitation is on record for CVE-2026-33258. EPSS is 0.80%. Act only if a listed version of By publishing and querying is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (By publishing and querying).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.80%
Remediation
Advisory link
Affected products
cpe powerdns/recursor

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe powerdns/recursor5.4.0

How to fix CVE-2026-33258

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33258. EPSS is 0.80%. Act only if a listed version of By publishing and querying is installed.

Which versions are affected?

Compare what you have installed with 5.4.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-770: Allocation of Resources Without Limits or Throttling. EPSS 0.80%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 22, 2026 · NIST NVD

    Detected

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

  2. Jun 17, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2026-33258

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33258

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33258

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.