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CVE-2026-42254

Quick assessment

Affected
Hickory Project Hickory DNS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hickory DNS是Hickory DNS开源的一个基于 Rust 的 DNS 客户端、服务器和解析器。 Hickory DNS 0.1版本至0.25.2版本存在安全漏洞，该漏洞源于缓存数据未直接与触发响应的查询关联，允许跨区域投毒。

CVSS 4.0 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-42254

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不正确的解析名称或索引
Source: CVE Program / CVE List V5
Vulnerability Title
Hickory DNS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hickory DNS是Hickory DNS开源的一个基于 Rust 的 DNS 客户端、服务器和解析器。 Hickory DNS 0.1版本至0.25.2版本存在安全漏洞，该漏洞源于缓存数据未直接与触发响应的查询关联，允许跨区域投毒。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Hickory Project Hickory DNS 0.1 ~ 0.26 -

II. Public POCs for CVE-2026-42254

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III. Intelligence Information for CVE-2026-42254

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Vendor Advisories for CVE-2026-42254 (1)

IV. Related Vulnerabilities

Same weakness: CWE-706

V. Comments for CVE-2026-42254

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