High severity · published Apr 15, 2026
CVE-2026-40719
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
Deadwood in MaraDNS 3.5.0036 allows attackers to exhaust connection slots via a zone whose authoritative nameserver address cannot be resolved.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
MaraDNS · MaraDNS
3.5.0036 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40719
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-40719
github.com
https://github.com/samboy/MaraDNS/security/advisories/GHSA-cfc6-vhrv-62cj
maradns.samiam.org
https://maradns.samiam.org/changelog.html
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