High severity · published Sep 18, 2026
CVE-2026-93657
hickory-resolver before 0.26.2 DNSSEC Validation Bypass
7.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HI
hickory-resolver · hickory-dns
before 0.26.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93657
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-93657
github.com
https://github.com/hickory-dns/hickory-dns
github.com
https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238
github.com
https://github.com/hickory-dns/hickory-dns/pull/3871
github.com
https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2
github.com
https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6
www.vulncheck.com
https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass