CVE-2026-93657 PUBLISHED

hickory-resolver before 0.26.2 DNSSEC Validation Bypass

Assigner: VulnCheck
Reserved: 18.09.2026 Published: 18.09.2026 Updated: 18.09.2026

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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	hickory-dns
Product	hickory-resolver
Versions	Default: unaffected affected from 0 to 0.26.2 (excl.) Version 0.26.2 is unaffected

CVE-2026-93657 PUBLISHED

hickory-resolver before 0.26.2 DNSSEC Validation Bypass

Metrics

Product Status

Credits

References

Problem Types