CVE-2026-42387
Insufficient input validation in ZoneToCache
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | powerdns |
| Product | recursor |
| Published | Jun 25, 2026 |
| Last Updated | Jun 25, 2026 |
Stay Ahead of the Next One
Get instant alerts for powerdns recursor
Be the first to know when new medium vulnerabilities affecting powerdns recursor are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
PowerDNS / Recursor
5.2.0 < 5.2.11 5.3.0 < 5.3.8 5.4.0 < 5.4.3
References
Credits
nurmukhammyed