Vulnerability · Published May 21, 2026 · Assigned by OX
CVE-2026-42001Insufficient Validation of Autoprimary SOA Queries
High 7.5
In plain English
A high-severity uncontrolled resource consumption in Authoritative from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 69.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Insufficient Validation of Autoprimary SOA Queries
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | pdns | 5.0.5-r0 | ALPINE-CVE-2026-42001 |
| Alpine:v3.24 | pdns | 5.0.5-r0 | ALPINE-CVE-2026-42001 |
| Debian:12 | pdns | no fix listed | DEBIAN-CVE-2026-42001 |
| Debian:13 | pdns | 4.9.15-0+deb13u1 | DEBIAN-CVE-2026-42001 |
| Debian:14 | pdns | 5.0.5-1 | DEBIAN-CVE-2026-42001 |
| Ubuntu:24.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-42001 |
| Ubuntu:25.10 | pdns | no fix listed | UBUNTU-CVE-2026-42001 |
| Ubuntu:26.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-42001 |
| Ubuntu:26.10 | pdns | no fix listed | UBUNTU-CVE-2026-42001 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PowerDNS | Authoritative | 4.9.0 – before 4.9.155.0.0 – before 5.0.5 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H