CVE catalog
CVE-2026-19538
nsd: CVE-2026-19538
- Severity
- High · CVSS 8.2
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.44% · Oct 25, 2026
The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nsd | sid | 4.15.4-1 | fixed |
| Debian | nsd | forky | 4.15.4-1 | fixed |
| Debian | nsd | trixie | 4.12.0-1 | vulnerable |
| Debian | nsd | bookworm | 4.6.1-1 | vulnerable |
| Cpe | nsd | Not reported | 4.15.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nsd | source | sid | 4.15.1-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | forky | 4.15.1-1 | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | nsd | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Cpe | nsd | cpe | Not reported | 4.15.1 | Not reported | NVD-CVE-2026-19538 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [nsd]Affected
Details (2)
4.6.1-1· amd64 · bookwormAffected
dsa · nsd · debian · bookworm; dsa · nsd · debian · 12
4.6.1-1· arm64 · bookwormAffected
dsa · nsd · debian · bookworm; dsa · nsd · debian · 12
[Debian 13 (Trixie)]
- [nsd]Affected
Details (2)
4.12.0-1· amd64 · trixieAffected
dsa · nsd · debian · 13
4.12.0-1· arm64 · trixieAffected
dsa · nsd · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-19538]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-19538]
- [https://security-tracker.debian.org/tracker/CVE-2026-19538]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19538.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3663.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]