PowerDNS Authoritative/DNSdist/Recursor denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability was found in PowerDNS Authoritative, DNSdist and Recursor. It has been classified as problematic. This affects an unknown function. Performing a manipulation results in denial of service. This vulnerability is cataloged as CVE-2026-33257. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in PowerDNS Authoritative, DNSdist and Recursor (unknown version). This affects an unknown code block. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was shared by Vitaly Simonovich. It is possible to read the advisory at docs.powerdns.com. This vulnerability is uniquely identified as CVE-2026-33257 since 03/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 321078 (Fedora 44 : dnsdist (2026-51cdd1292b)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (321078) and CERT Bund (WID-SEC-2026-1225). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • SUSE openSUSE
  • Open Source PowerDNS

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 321078
Nessus Name: Fedora 44 : dnsdist (2026-51cdd1292b)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/18/2026 CVE reserved
04/22/2026 +34 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
06/15/2026 +54 days VulDB entry last update

Sourcesinfo

Advisory: docs.powerdns.com
Researcher: Vitaly Simonovich
Status: Confirmed

CVE: CVE-2026-33257 (🔒)
GCVE (CVE): GCVE-0-2026-33257
GCVE (VulDB): GCVE-100-358839
CERT Bund: WID-SEC-2026-1225 - PowerDNS: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 13:29
Updated: 06/15/2026 13:40
Changes: 04/22/2026 13:29 (63), 05/03/2026 20:14 (7), 06/15/2026 13:40 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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