Insufficient input validation of internal webserver

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-33257
StatePUBLISHED
AssignerOX
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 10:16:51 UTC
Updated2026-04-22 10:16:51 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem Types: Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA PowerDNS Authoritative affected 5.0.0 5.0.4 semver Not specified
CNA PowerDNS Authoritative affected 4.9.0 4.9.14 semver Not specified
CNA PowerDNS DNSdist affected 1.9.0 1.9.13 semver Not specified
CNA PowerDNS DNSdist affected 2.0.0 2.0.4 semver Not specified
CNA PowerDNS Recursor affected 5.4.0 5.4.1 semver Not specified
CNA PowerDNS Recursor affected 5.3.0 5.3.6 semver Not specified
CNA PowerDNS Recursor affected 5.2.0 5.2.9 semver Not specified

References

ReferenceSourceLinkTags
www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html [email protected] www.dnsdist.org
docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-... [email protected] docs.powerdns.com
docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-05.html [email protected] docs.powerdns.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Vitaly Simonovich (en)

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