Vulnerability DatabaseCVE-2026-42387
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CVE-2026-42387
Published:June 25, 2026
Updated:June 29, 2026
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.
Affected Packages
https://github.com/PowerDNS/pdns.git (GITHUB):
Affected version(s) >=rec-5.3.0 <rec-5.3.8
Fix Suggestion:
Update to version rec-5.3.8
https://github.com/PowerDNS/pdns.git (GITHUB):
Affected version(s) >=rec-5.2.0 <rec-5.2.11
Fix Suggestion:
Update to version rec-5.2.11
https://github.com/PowerDNS/pdns.git (GITHUB):
Affected version(s) >=rec-5.4.0 <rec-5.4.3
Fix Suggestion:
Update to version rec-5.4.3
Related Resources (1)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html
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CVSS v4
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Input Validation
CWE-20
EPSS
Base Score:
0.40