Loading...
Skip to main content
GeekWala

CVE-2026-93657 — Vulnerability in hickory-resolver — CVE Details

HIGH

hickory-resolver: Resolver::lookup() and Resolver::lookup_ip() APIs obscure DNSSEC validation failures

Published October 5, 2026Updated October 5, 2026Source: osv

Summary

When calling `Resolver::lookup()` or `Resolver::lookup_ip()` on a resolver with DNSSEC validation enabled, both methods return `Ok(...)` if DNSSEC validation fails. It is possible but very inconvenient to check the validation status of individual records. These methods should instead return an error when DNSSEC validation determines a response is bogus.

Advisory Timeline

  • First published October 5, 2026 (6 days ago).
  • Last revised October 5, 2026 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update hickory-resolver to 0.26.2 or later
cargo update -p hickory-resolver --precise 0.26.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
hickory-resolver
crates.io
All versions0.26.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-347
    Improper Verification of Cryptographic SignatureMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

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

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

References

Frequently Asked Questions

What is CVE-2026-93657?
hickory-resolver: Resolver::lookup() and Resolver::lookup_ip() APIs obscure DNSSEC validation failures This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2026-93657?
CVE-2026-93657 affects hickory-resolver. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-93657 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-5j98-2g5x-46v6

Related CVEs

  • CVE-2026-102823
    HIGH

    russh: Client-side channel-scoped Handler callbacks fire for channel IDs the client never opened

  • CVE-2026-18140
    HIGH

    aws-smithy-json: Uncontrolled recursion in the aws-smithy-json unknown-key skip path allows unauthenticated remote denial of service in smithy-rs generated servers

More crates.io advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies