What is CVE-2026-93657?

CVE-2026-93657 is a high-severity vulnerability in Hickory-Dns Hickory-Resolver, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-09-18.

How severe is CVE-2026-93657?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Hickory-Dns Hickory-Resolver

CVE-2026-93657

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.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Hickory-dns Hickory-resolver

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking, patch)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-93657?: CVE-2026-93657 is a high-severity vulnerability in Hickory-Dns Hickory-Resolver, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2026-09-18.
How severe is CVE-2026-93657?: High severity. CVSS v3 base score is 7.5 out of 10.