Vulnerability in Nlnet Labs Ldns
CVE-2026-10846
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Nlnet Labs Ldns — versions 1.2.0
- Nlnetlabs Ldns
Weakness classification (CWE)
References
- www.nlnetlabs.nl/downloads/ldns/CVE-2026-10846.txt (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-10846?
- CVE-2026-10846 is a high-severity vulnerability in Nlnet Labs Ldns, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-06-10.
- How severe is CVE-2026-10846?
- High severity. CVSS v3 base score is 7.5 out of 10.