CVE-2026-42389 — MEDIUM (5.3)

Vulnerability Description

This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-20

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdn

FAQ

What is CVE-2026-42389?

CVE-2026-42389 is a vulnerability with a CVSS score of 5.3 (MEDIUM). This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.

How severe is CVE-2026-42389?

CVE-2026-42389 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42389?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.