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URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0398

⇱ NVD - CVE-2026-0398

  1. Vulnerabilities

CVE-2026-0398 Detail

Description

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html Open-Xchange Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-770 Allocation of Resources Without Limits or Throttling CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 6:10:44 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-02-09T15:36:48.242785Z","id":"CVE-2026-0398","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by Open-Xchange 6/17/2026 6:10:44 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"PowerDNS","product":"Recursor","defaultStatus":"unaffected","collectionURL":"https://repo.powerdns.com/","packageName":"pdns-recursor","modules":["Synchronous Resolver"],"programFiles":["syncres.cc"],"repo":"https://github.com/PowerDNS/pdns","versions":[{"version":"5.3.0","lessThan":"5.3.5","versionType":"semver","status":"affected"},{"version":"5.2.0","lessThan":"5.2.8","versionType":"semver","status":"affected"},{"version":"5.1.0","lessThan":"5.1.10","versionType":"semver","status":"affected"}]}]

Initial Analysis by NIST 4/20/2026 10:55:46 AM

Action Type Old Value New Value
Added CPE Configuration 
OR
 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 5.1.0 up to (excluding) 5.1.10
 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 5.2.8 up to (excluding) 5.2.8
 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 5.3.0 up to (excluding) 5.3.5
Added Reference Type 
Open-Xchange: https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html Types: Vendor Advisory

CVE Modified by CISA-ADP 2/09/2026 11:16:00 AM

Action Type Old Value New Value
Added CWE 
CWE-770

New CVE Received from Open-Xchange 2/09/2026 10:16:11 AM

Action Type Old Value New Value
Added Description 
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
Added CVSS V3.1 
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Added Reference 
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html

Quick Info

CVE Dictionary Entry:
CVE-2026-0398
NVD Published Date:
02/09/2026
NVD Last Modified:
06/17/2026
Source:
Open-Xchange