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CVE-2026-93657— hickory-resolver before 0.26.2 DNSSEC Validation Bypass

Quick assessment

Affected
hickory-dns hickory-resolver
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-resolver 在 0.26.2 版本之前，未能通过 和 接口正确传播虚假的 DNSSEC 验证状态，导致无效的 DNS 记录可能被作为成功结果返回。控制应答区域的攻击者，或位于网络路径上的攻击者，可以利用该漏洞使伪造的 DNS 记录被接受为已验证状态，从而绕过 DNSSEC 身份验证检查。

CVSS 7.5 · High EPSS 0.23% · P14

Affected Version Matrix 2

VendorProduct Version RangeStatus
hickory-dns hickory-resolver < 0.26.2 affected
0.26.2 unaffected
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I. Basic Information for CVE-2026-93657

Vulnerability Information
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Vulnerability Title
hickory-resolver before 0.26.2 DNSSEC Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
hickory-dns hickory-resolver 0 ~ 0.26.2 -

II. Public POCs for CVE-2026-93657

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III. Intelligence Information for CVE-2026-93657

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Patches & Fixes for CVE-2026-93657 (1)

Vendor Advisories for CVE-2026-93657 (1)

Other References for CVE-2026-93657 (2)

IV. Related Vulnerabilities

Same vendor: hickory-dns
Same weakness: CWE-347

V. Comments for CVE-2026-93657

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