CVE-2026-42254 — MEDIUM (4.0)

Vulnerability Description

Hickory DNS hickory-recursor 0.1 through 0.25.2 allows cross-zone poisoning because cached data is not directly associated with a query that triggered a response.

CVSS Score

4.0

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-706

References

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-83hf-93m4-rg

FAQ

What is CVE-2026-42254?

CVE-2026-42254 is a vulnerability with a CVSS score of 4.0 (MEDIUM). Hickory DNS hickory-recursor 0.1 through 0.25.2 allows cross-zone poisoning because cached data is not directly associated with a query that triggered a response.

How severe is CVE-2026-42254?

CVE-2026-42254 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-42254?

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