CVE-2026-93657 hickory-resolver before 0.26.2 DNSSEC Validation Bypass
Attackers can bypass DNSSEC validation in hickory-resolver, causing forged DNS records to be accepted as valid by applications using the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93657?
CVE-2026-93657 is a high-severity vulnerability in hickory-dns hickory-resolver, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-347
Which versions are affected by CVE-2026-93657?
2 open source packages ship an affected version, including hickory-resolver.
| Package | Affected | Fixed in |
|---|---|---|
hickory-resolver crates.io | All versions | 0.26.2 |
hickory-resolver crates.io | All versions | 0.26.2 |
How do I fix CVE-2026-93657?
Upgrade hickory-resolver to 0.26.2 or later.
Is CVE-2026-93657 being exploited?
There is no known exploitation of CVE-2026-93657 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-93657, GHSA-5j98-2g5x-46v6, GHSA-884w-h442-q7ph, MINI-4qqv-5v7v-rhj5, MINI-79pv-pf94-mj5h, MINI-85w9-8m26-4phr and 14 more.