CVE-2026-42254 | BDVDB-2026-329124 Detail

Hickory ProjectHickory DNS

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-706 Use of Incorrectly-Resolved Name or Reference

References#

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

Exploit#

No public exploit known

History#

Version 12026-04-26Record published in the CVE List.
Version 22026-04-27Most recent update recorded in the CVE List.

Published

Published: 2026-04-26
Last modified: 2026-04-27

Vendor information

Vendor: Hickory Project
Product: Hickory DNS

All Hickory Project vulnerabilities

Score

4.0 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 5.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 0.1 and < 0.26
Fixed
0.26

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.0 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	None
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).