CVE-2026-10846CWE-346

Insufficient verification that responses belong to a query

High · published June 10, 2026

CVSS v4.0
8.2
EPSS
0%
Percentile
3.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.2 · HIGH
Vector
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
EPSS
0.00147 · 3.6th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-06-10T06:37Z
EPSS history
Timeline
  • 10 JUN 06:37Z
    Insufficient verification that responses belong to a query
    cvelistv5