Vulnerability · Published Jun 25, 2026 · Assigned by OX
CVE-2026-42388Missing input validation for catalog zones
Medium 5.9
In plain English
A medium-severity improper input validation in Recursor from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.5%top 58.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | pdns-recursor | 5.4.3-r0 | ALPINE-CVE-2026-42388 |
| Debian:12 | pdns-recursor | no fix listed | DEBIAN-CVE-2026-42388 |
| Debian:13 | pdns-recursor | 5.2.11-0+deb13u1 | DEBIAN-CVE-2026-42388 |
| Debian:14 | pdns-recursor | 5.4.3-1 | DEBIAN-CVE-2026-42388 |
| Ubuntu:24.04:LTS | pdns-recursor | no fix listed | UBUNTU-CVE-2026-42388 |
| Ubuntu:25.10 | pdns-recursor | no fix listed | UBUNTU-CVE-2026-42388 |
| Ubuntu:26.04:LTS | pdns-recursor | no fix listed | UBUNTU-CVE-2026-42388 |
| Ubuntu:26.10 | pdns-recursor | no fix listed | UBUNTU-CVE-2026-42388 |
Affected products (as reported)
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H