# Nlnetlabs Nsd vulnerabilities

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

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Nlnetlabs Nsd: 0 in the last 7 days and 4 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-19538, was published on 26 August 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 4
- All time: 4 (1 critical, 0 exploited in the wild)

## About Nlnetlabs Nsd

NSD is an authoritative DNS server implementation.

## Latest Nlnetlabs Nsd vulnerabilities

- [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 Nsd 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)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| 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 | 0 | 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 |

## 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 Nsd vulnerabilities", https://junglewise.ai/threats/technologies/nsd, 10 November 2026.