PowerDNS Authoritative up to 4.9.14/5.0.4 GSS-TSIG 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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4.7$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in PowerDNS Authoritative up to 4.9.14/5.0.4. Affected by this issue is some unknown functionality of the component GSS-TSIG Handler. The manipulation leads to denial of service. This vulnerability is listed as CVE-2026-42002. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in PowerDNS Authoritative up to 4.9.14/5.0.4. It has been rated as problematic. This issue affects some unknown functionality of the component GSS-TSIG Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability.

The weakness was presented by thanos_haruki. It is possible to read the advisory at docs.powerdns.com. The identification of this vulnerability is CVE-2026-42002 since 04/23/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful 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 315941 (Debian dsa-6284 : pdns-backend-bind - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.15 or 5.0.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (315941), EUVD (EUVD-2026-31260) and CERT Bund (WID-SEC-2026-1625). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Open Source PowerDNS

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
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: 315941
Nessus Name: Debian dsa-6284 : pdns-backend-bind - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Authoritative 4.9.15/5.0.5

Timelineinfo

04/23/2026 CVE reserved
05/21/2026 +28 days Advisory disclosed
05/21/2026 +0 days VulDB entry created
05/21/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: docs.powerdns.com
Researcher: thanos_haruki
Status: Confirmed

CVE: CVE-2026-42002 (🔒)
GCVE (CVE): GCVE-0-2026-42002
GCVE (VulDB): GCVE-100-365003
EUVD: 🔒
CERT Bund: WID-SEC-2026-1625 - PowerDNS Authoritative Server: Mehrere Schwachstellen

Entryinfo

Created: 05/21/2026 12:53
Updated: 05/21/2026 18:37
Changes: 05/21/2026 12:53 (64), 05/21/2026 15:20 (1), 05/21/2026 15:35 (2), 05/21/2026 18:37 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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