Powerdns
CVE-2026-0398
MEDIUM
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
AnalysisAI
DNS recursive resolver denial-of-service via crafted zones and CNAME chain manipulation allows unauthenticated attackers to exhaust server resources and potentially poison the resolver's cache. The vulnerability affects Recursor instances exposed to untrusted DNS queries, enabling attackers to degrade performance or compromise DNS resolution integrity. No patch is currently available.
Technical ContextAI
This vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . Rated high severity (CVSS 7.5), this
PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a denial of service (backend CPU
A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. Rated high severity (CVSS 8.8)
PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE
The resolver in PowerDNS Recursor (aka pdns_recursor) 3.3 overwrites cached server names and TTL values in NS records du
An issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. Rated criti
An issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of response
dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack.
An issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. Rated high severity (CVSS 8.8), this vulne
Denial of service in PowerDNS Authoritative DNS server (versions 4.9.0-4.9.14 and 5.0.0-5.0.4) arises from insufficient
Out-of-bounds read in PowerDNS dnsdist allows unauthenticated remote attackers to trigger denial of service or potential
Crafted delegations or IP fragments can poison cached delegations in Recursor. [CVSS 8.2 HIGH]
Same technique Denial Of Service
View allVendor StatusVendor
SUSE
Severity: MediumShare
External POC / Exploit Code
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