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CVE-2026-33257

Insufficient input validation of internal webserver

Published: Apr 22, 2026Updated: Apr 27, 2026 Sources: CVE List NVDCWE-770
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.5%
Top 60.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-770

Affected Products

AuthoritativePowerDNS
On-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
DNSdistPowerDNS
On-prem
Networking Infrastructure / dns-dhcp-ntp
RecursorPowerDNS
On-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
authoritativepowerdns
On-premNetwork Device
Networking Infrastructure / dns-dhcp-ntp
dnsdistpowerdns
On-prem
Networking Infrastructure / dns-dhcp-ntp
powerdnsoss-projectDKNetworking Infrastructureaka powerdns recursor, powerdns authoritative, dnsdist
and 1 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-05.html
docs.powerdns.com
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html
dnsdist.org
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html
docs.powerdns.com

Timeline

Published
Apr 22, 2026
Last Updated
Apr 27, 2026

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