Search/CVE-2026-42004
● CVE — Low

CVE-2026-42004

DiscoveredJun 25, 2026UpdatedOct 25, 2026

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.

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CVSS v3.1
3.7 LOW
EPSS
0.22%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 25, 2026
▲ 0.07pp
0.16% → 0.22% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityLOW
AvailabilityNONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Connections
1 relationships
Timeline
disclosure → media coverage
Jun 25, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 25, 2026