What is CVE-2026-42000?

CVE-2026-42000 is a medium-severity vulnerability in Powerdns Authoritative, classified under Command Injection. CVSS score: 6.8/10. Published 2026-05-21.

How severe is CVE-2026-42000?

Medium severity. CVSS v3 base score is 6.8 out of 10.

RCE in Powerdns Authoritative

CVE-2026-42000

Insufficient Validation of Names During AXFR

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (3.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.

Affected products

Powerdns Authoritative — versions 4.9.0, 5.0.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

security@open-xchange.com (Broken Link)

Frequently asked questions

What is CVE-2026-42000?: CVE-2026-42000 is a medium-severity vulnerability in Powerdns Authoritative, classified under Command Injection. CVSS score: 6.8/10. Published 2026-05-21.
How severe is CVE-2026-42000?: Medium severity. CVSS v3 base score is 6.8 out of 10.