# Nlnetlabs vulnerabilities

Source: https://junglewise.ai/threats/vendors/nlnetlabs  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/nlnetlabs.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Nlnetlabs: 0 in the last 7 days and 5 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, NLnetLabs domain DNS library panics and resource exhaustion, was published on 25 September 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 5
- All time: 5 (1 critical, 0 exploited in the wild)

## About Nlnetlabs

Dutch research institute focused on Internet infrastructure and DNS technologies.

## Latest Nlnetlabs vulnerabilities

- [NLnetLabs domain DNS library panics and resource exhaustion](https://junglewise.ai/threats/rustsec-2026-0310-various-panics-soundness-and-resource-exhaustion-e61b68e0) (info, published 25 Sep 2026)
- [CVE-2026-19538: NSD access control list bypass via proxy protocol](https://junglewise.ai/threats/cve-2026-19538-nsd-access-control-list-bypass-via-proxy-protocol) (high, CVSS 7.5, published 26 Aug 2026)
- [CVE-2026-19401: NLnetLabs NSD denial of service via crafted DNS Cookie options](https://junglewise.ai/threats/cve-2026-19401-nlnetlabs-nsd-denial-of-service-via-crafted-dns-cookie-options) (high, CVSS 7.5, published 26 Aug 2026)
- [CVE-2026-18916: NSD denial of service via TCP receive window throttling](https://junglewise.ai/threats/cve-2026-18916-nsd-denial-of-service-via-tcp-receive-window-throttling) (high, CVSS 7.5, published 26 Aug 2026)
- [CVE-2026-18664: NLnet Labs NSD IP range access control bypass](https://junglewise.ai/threats/cve-2026-18664-nlnet-labs-nsd-ip-range-access-control-bypass) (critical, CVSS 9.1, published 26 Aug 2026)

## Most severe Nlnetlabs vulnerabilities

- [CVE-2026-18664: NLnet Labs NSD IP range access control bypass](https://junglewise.ai/threats/cve-2026-18664-nlnet-labs-nsd-ip-range-access-control-bypass) (critical, CVSS 9.1, published 26 Aug 2026)
- [CVE-2026-19401: NLnetLabs NSD denial of service via crafted DNS Cookie options](https://junglewise.ai/threats/cve-2026-19401-nlnetlabs-nsd-denial-of-service-via-crafted-dns-cookie-options) (high, CVSS 7.5, published 26 Aug 2026)
- [CVE-2026-18916: NSD denial of service via TCP receive window throttling](https://junglewise.ai/threats/cve-2026-18916-nsd-denial-of-service-via-tcp-receive-window-throttling) (high, CVSS 7.5, published 26 Aug 2026)
- [CVE-2026-19538: NSD access control list bypass via proxy protocol](https://junglewise.ai/threats/cve-2026-19538-nsd-access-control-list-bypass-via-proxy-protocol) (high, CVSS 7.5, published 26 Aug 2026)
- [NLnetLabs domain DNS library panics and resource exhaustion](https://junglewise.ai/threats/rustsec-2026-0310-various-panics-soundness-and-resource-exhaustion-e61b68e0) (info, published 25 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 4 | 1 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 1 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Nlnetlabs technologies

- [Nlnetlabs Nsd](https://junglewise.ai/threats/technologies/nsd): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Nlnetlabs vulnerabilities", https://junglewise.ai/threats/vendors/nlnetlabs, 10 November 2026.