TI-2026-30393 Aliases CVE-2026-42005 GHSA-27xg-fw4v-jgv6

Insufficient input validation of internal web server

LOW 21CWE-400Published 2026-06-25 · Updated 2026-06-25

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00625 50th percentileScored 2026-11-07

Fix Fixed Authoritative (PowerDNS): 4.9.16, 5.0.6, 5.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
PowerDNS	Authoritative	4.9.0 to before 4.9.16; 5.0.0 to before 5.0.6; 5.1.0 to before 5.1.2	4.9.16, 5.0.6, 5.1.2	Patch available	CNA

Authoritative VendorPowerDNS Affected 4.9.0 to before 4.9.16; 5.0.0 to before 5.0.6; 5.1.0 to before 5.1.2 Fixed in 4.9.16, 5.0.6, 5.1.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:powerdns:authoritative::::::::	—	—	PowerDNS

cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:* Versions — — ·PowerDNS

Remediation

Fix · CNA Authoritative (PowerDNS) Fixed in 4.9.16, 5.0.6, 5.1.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-42005
2026-10-03 Alias added: GHSA-27xg-fw4v-jgv6
2026-10-31 EPSS moved to the 50th–90th percentile
2026-11-01 EPSS moved to the below the 50th percentile
2026-11-03 EPSS moved to the 50th–90th percentile

References

Other 1

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-07.html

TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
TI-2015-01678 The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and… CVSS 2.0HIGH 7.8
TI-2021-14878 PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by… CVSS 3.1HIGH 7.5
TI-2016-04703 PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . CVSS 3.0HIGH 7.5
TI-2018-12065 Out-of-bounds read in [UNKNOWN] pdns-recursor CVSS 3.0HIGH 7.5

See all 130 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences