Medium severity · published Jun 25, 2026
CVE-2026-42005
Insufficient input validation of internal web server
4.3
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AU
Authoritative · PowerDNS
4.9.0 before 4.9.16; 5.0.0 before 5.0.6; 5.1.0 before 5.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42005
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42005
docs.powerdns.com
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-07.html
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