CVE-2026-10846
HIGHNLnet Labs ldns - Insufficient Verification That Responses Belong to a Query
Title source: ruleDescription
NLnet Labs ldns 1.2.0 up to and including versions 1.9.0, when used in applications as (stub) resolver over UDP, lacks matching the query destination address and port with the response source address and port. Furthermore not the query ID, neither the question of the query is matched with that of the response. This makes applications, that use ldns for (stub) resolver functionality over UDP, vulnerable for off-path poisoning attacks. The drill tool, which is shipped with ldns, suffers from this vulnerability.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
https://www.nlnetlabs.nl/downloads/ldns/CVE-2026-10846.txt
Scores
CVSS v4
8.2
EPSS
0.0019
EPSS Percentile
8.9%
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-346
Status
published
Products (1)
NLnet Labs/ldns
1.2.0 - 1.9.1
Published
Jun 10, 2026
Tracked Since
Jun 10, 2026