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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (14.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.002 · change: -0.002
Affected products
Weakness classification (CWE)
References
- github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6 (vendor-advisory)
- github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd… (patch)
- github.com/hickory-dns/hickory-dns/pull/3871 (issue-tracking, patch)
- github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2 (release-notes)
- github.com/hickory-dns/hickory-dns (product)
- www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-b… (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.