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Findings

CVE-2026-33257

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service.

Published Apr 22, 2026 · corrected/updated Jun 17, 2026 · powerdns authoritative · evidence confidence medium

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-33257 is a high public vulnerability record for powerdns authoritative. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether powerdns authoritative is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: powerdns/authoritative; powerdns/dnsdist; powerdns/recursor; powerdns/recursor (5.4.0). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 7.5. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-770. Sources contributing to this record: cve_org, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

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

    An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

  2. Jun 17, 2026 · NIST NVD

    Updated

    An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Affected

  • cpe powerdns/authoritativeversion unspecified
  • cpe powerdns/dnsdistversion unspecified
  • cpe powerdns/recursorversion unspecified
  • cpe powerdns/recursor5.4.0

Sources

  • CVE.orgVulnerability recordCVE-2026-33257

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-33257

    An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

    nvd.nist.gov

References