CVE-2026-42004
Detail
Not Scheduled
This CVE record is not being prioritized for NVD enrichment efforts due to resource or other concerns.
Description
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
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.
CVSS 3.x Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
CWE-115
|
Misinterpretation of Input |
CISA-ADP
|
Change History
2 change records found show changes
CVE Modified by CISA-ADP
6/25/2026 10:16:39 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CWE |
CWE-115
|
| Added |
SSVC |
{"timestamp":"2026-06-25T13:44:02.980438Z","id":"CVE-2026-42004","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
|
New CVE Received from Open-Xchange
6/25/2026 9:16:40 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Description |
An attacker can send a crafted EDNS OPT record that will be ignored by DNSdist’s filtering rules, but will be rewritten as a valid OPT record when EDNS Client Subnet is inserted, causing the backend to see the EDNS option(s) that DNSdist did not filter.
|
| Added |
CVSS V3.1 |
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
|
| Added |
Reference |
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-09.html
|
| Added |
Affected |
[{"vendor":"PowerDNS","product":"DNSdist","defaultStatus":"unaffected","collectionURL":"https://repo.powerdns.com/","packageName":"dnsdist","modules":["EDNS processing"],"programFiles":["dnsdist-ecs.cc"],"repo":"https://github.com/PowerDNS/pdns","versions":[{"version":"1.9.0","lessThan":"1.9.15","versionType":"semver","status":"affected"},{"version":"2.0.0","lessThan":"2.0.7","versionType":"semver","status":"affected"}]}]
|
Quick Info
CVE Dictionary Entry: CVE-2026-42004 NVD
Published Date: 06/25/2026 NVD
Last Modified: 06/25/2026
Source: Open-Xchange
|
