Findings

CVE-2026-33256

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 · updated Jun 17, 2026 · powerdns recursor

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.

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/recursorversion unspecified
  • cpe powerdns/recursor5.4.0

Sources

  • CVE.orgVulnerability recordCVE-2026-33256

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-33256

    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

CVE-2026-33256 · ZeroDay Findings