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CVE-2026-42005

Insufficient input validation of internal web server

MEDIUM
4.3
CVSS Score
Published: June 25, 2026 at 11:57 AM UTC
Updated: October 25, 2026 at 11:10 PM UTC
1 product affected across 1 vendorAuthoritative

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Authoritative· Powerdns
90%
4.9.0 ≤ v < 4.9.165.0.0 ≤ v < 5.0.65.1.0 ≤ v < 5.1.24.9.05.0.05.1.0
Affected range stops below 4.9.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMOX
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-400

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